repos/blastem: lc8951.c annotate

annotate lc8951.c @ 2496:187bc857a76a default tip

Fix bug in MED mapper protection bit implementation

author	Michael Pavone <pavone@retrodev.com>
date	Sun, 28 Apr 2024 23:33:11 -0700
parents	0871f555eff6
children

rev	line source
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	1 #include "lc8951.h"
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	2 #include "backend.h"
2342 9f0c67e5c50a Implement CD-ROM data sector scrambling/descrambling Michael Pavone <pavone@retrodev.com> parents: 2280 diff changeset	3 #include "cdimage.h"
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	4
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	5 enum {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	6 COMIN,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	7 IFSTAT,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	8 DBCL,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	9 DBCH,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	10 HEAD0,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	11 HEAD1,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	12 HEAD2,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	13 HEAD3,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	14 PTL,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	15 PTH,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	16 WAL,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	17 WAH,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	18 STAT0,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	19 STAT1,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	20 STAT2,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	21 STAT3,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	22
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	23 SBOUT = COMIN,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	24 IFCTRL = IFSTAT,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	25 DACL = HEAD0,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	26 DACH = HEAD1,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	27 DTTRG = HEAD2,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	28 DTACK = HEAD3,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	29 WAL_WRITE = PTL,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	30 WAH_WRITE = PTH,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	31 CTRL0 = WAL,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	32 CTRL1 = WAH,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	33 PTL_WRITE = STAT0,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	34 PTH_WRITE = STAT1,
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	35 RESET = STAT3
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	36 };
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	37
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	38 //IFCTRL
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	39 #define BIT_CMDIEN 0x80
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	40 #define BIT_DTEIEN 0x40
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	41 #define BIT_DECIEN 0x20
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	42 #define BIT_CMDBK 0x10
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	43 #define BIT_DTWAI 0x08
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	44 #define BIT_STWAI 0x04
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	45 #define BIT_DOUTEN 0x02
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	46 #define BIT_SOUTEN 0x01
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	47
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	48 //IFSTAT
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	49 #define BIT_CMDI 0x80
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	50 #define BIT_DTEI 0x40
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	51 #define BIT_DECI 0x20
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	52 #define BIT_DTBSY 0x08
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	53 #define BIT_STBSY 0x04
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	54 #define BIT_DTEN 0x02
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	55 #define BIT_STEN 0x01
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	56
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	57 //CTRL0
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	58 #define BIT_DECEN 0x80
2419 0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	59 #define BIT_EDCRQ 0x40
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	60 #define BIT_WRRQ 0x04
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	61 #define BIT_ORQ 0x02
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	62 #define BIT_PRQ 0x01
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	63
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	64 //CTRL1
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	65 #define BIT_SYIEN 0x80
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	66 #define BIT_SYDEN 0x40
2342 9f0c67e5c50a Implement CD-ROM data sector scrambling/descrambling Michael Pavone <pavone@retrodev.com> parents: 2280 diff changeset	67 #define BIT_DSCREN 0x20
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	68
2067 f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	69 //STAT0
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	70 #define BIT_CRCOK 0x80
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	71 #define BIT_ILSYNC 0x40
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	72 #define BIT_NOSYNC 0x20
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	73 #define BIT_LBLK 0x10
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	74 #define BIT_SBLK 0x04
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	75 #define BIT_UCEBLK 0x01
2067 f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	76
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	77 //STAT3
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	78 #define BIT_VALST 0x80
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	79 #define BIT_WLONG 0x40
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	80
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	81 //datasheet timing info
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	82 //3 cycles for memory operation
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	83 //6 cycles min for DMA-mode host transfer
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	84
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	85 void lc8951_init(lc8951 context, lcd8951_byte_recv_fun byte_handler, void handler_data)
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	86 {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	87 //This seems to vary somewhat between Sega CD models
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	88 //unclear if the difference is in the lc8951 or gate array
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	89 context->regs[IFSTAT] = 0xFF;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	90 context->ar_mask = 0x1F;
2144 10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	91 context->clock_step = (2 + 2); // external divider, internal divider
10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	92 context->cycles_per_byte = context->clock_step * 6;
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	93 context->byte_handler = byte_handler;
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	94 context->handler_data = handler_data;
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	95 context->decode_end = CYCLE_NEVER;
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	96 context->transfer_end = CYCLE_NEVER;
2144 10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	97 context->next_byte_cycle = CYCLE_NEVER;
10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	98 }
10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	99
10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	100 void lc8951_set_dma_multiple(lc8951 *context, uint32_t multiple)
10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	101 {
10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	102 context->cycles_per_byte = context->clock_step * multiple;
10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	103 if (context->transfer_end != CYCLE_NEVER) {
10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	104 uint16_t transfer_size = context->regs[DBCL] \| (context->regs[DBCH] << 8);
10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	105 context->transfer_end = context->next_byte_cycle + transfer_size * context->cycles_per_byte;
10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	106 }
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	107 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	108
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	109 void lc8951_reg_write(lc8951 *context, uint8_t value)
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	110 {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	111 switch (context->ar)
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	112 {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	113 case SBOUT:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	114 context->regs[context->ar] = value;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	115 if (context->ifctrl & BIT_SOUTEN) {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	116 context->regs[IFSTAT] &= ~BIT_STBSY;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	117 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	118 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	119 case IFCTRL:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	120 context->ifctrl = value;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	121 if (!(value & BIT_SOUTEN)) {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	122 context->regs[IFSTAT] \|= BIT_STBSY;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	123 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	124 if (!(value & BIT_DOUTEN)) {
2066 a61a8a87410c Fix a bunch of CDC/CDD related mcd-verificator failures Michael Pavone <pavone@retrodev.com> parents: 2065 diff changeset	125 context->regs[IFSTAT] \|= BIT_DTBSY\|BIT_DTEI;
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	126 context->transfer_end = CYCLE_NEVER;
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	127 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	128 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	129 case DBCL:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	130 context->regs[context->ar] = value;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	131 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	132 case DBCH:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	133 context->regs[context->ar] = value & 0xF;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	134 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	135 case DACL:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	136 context->dac &= 0xFF00;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	137 context->dac \|= value;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	138 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	139 case DACH:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	140 context->dac &= 0xFF;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	141 context->dac \|= value << 8;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	142 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	143 case DTTRG:
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	144 if (context->ifctrl & BIT_DOUTEN) {
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	145 context->regs[IFSTAT] &= ~BIT_DTBSY;
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	146 uint16_t transfer_size = context->regs[DBCL] \| (context->regs[DBCH] << 8);
2144 10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	147 context->transfer_end = context->cycle + transfer_size * context->cycles_per_byte;
10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	148 context->next_byte_cycle = context->cycle;
2231 8e6fb2c06024 Fix CDC transfer regression Michael Pavone <pavone@retrodev.com> parents: 2153 diff changeset	149 context->triggered = 1;
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	150 printf("DTTRG: size %u, cycle %u, end %u\n", transfer_size, context->cycle, context->transfer_end);
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	151 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	152 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	153 case DTACK:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	154 context->regs[IFSTAT] \|= BIT_DTEI;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	155 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	156 case WAL_WRITE:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	157 context->regs[WAL] = value;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	158 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	159 case WAH_WRITE:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	160 context->regs[WAH] = value;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	161 break;
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	162 case CTRL0:
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	163 context->ctrl0 = value;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	164 break;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	165 case CTRL1:
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	166 context->ctrl1 = value;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	167 break;
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	168 case PTL_WRITE:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	169 context->regs[PTL] = value;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	170 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	171 case PTH_WRITE:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	172 context->regs[PTH] = value;
2067 f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	173 //TODO: Datasheet says any write to PT triggers a decode, but initial tests suggest that's not the case
f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	174 //Need to do more tests with other CTRL0/CTRL1 settings
f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	175 //context->decode_end = context->cycle + 2352 * context->clock_step * 4;
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	176 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	177 case RESET:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	178 context->comin_count = 0;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	179 context->regs[IFSTAT] = 0xFF;
2080 bafb757e1cd2 Implement CD audio Michael Pavone <pavone@retrodev.com> parents: 2073 diff changeset	180 context->ifctrl = 0;
bafb757e1cd2 Implement CD audio Michael Pavone <pavone@retrodev.com> parents: 2073 diff changeset	181 context->ctrl0 = 0;
bafb757e1cd2 Implement CD audio Michael Pavone <pavone@retrodev.com> parents: 2073 diff changeset	182 context->ctrl1 = 0;
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	183 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	184 default:
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	185 break;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	186 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	187 if (context->ar != SBOUT) {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	188 context->ar++;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	189 context->ar &= context->ar_mask;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	190 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	191 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	192
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	193 uint8_t lc8951_reg_read(lc8951 *context)
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	194 {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	195 uint8_t value;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	196 if (context->ar == COMIN) {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	197 if (!context->comin_count) {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	198 return 0xFF;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	199 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	200 value = context->comin[(context->comin_write - context->comin_count)&sizeof(context->comin)];
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	201 context->comin_count--;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	202 if (!context->comin_count) {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	203 context->regs[IFSTAT] \|= BIT_CMDI;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	204 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	205 return value;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	206 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	207 if (context->ar == STAT3) {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	208 context->regs[IFSTAT] \|= BIT_DECI;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	209 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	210 if (context->ar >= sizeof(context->regs)) {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	211 value = 0xFF;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	212 } else {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	213 value = context->regs[context->ar];
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	214 }
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	215 printf("CDC read %X: %X\n", context->ar, value);
2058 70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	216 context->ar++;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	217 context->ar &= context->ar_mask;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	218 return value;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	219 }
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	220
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	221 void lc8951_ar_write(lc8951 *context, uint8_t value)
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	222 {
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	223 context->ar = value & context->ar_mask;
70260f6051dd Initial work on CDC emulation Michael Pavone <pavone@retrodev.com> parents: diff changeset	224 }
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	225
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	226 //25 MHz clock input (1/2 SCD MCLK)
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	227 //internal /2 divider
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	228 //3 cycles for each SRAM access (though might be crystal frequency rather than internal frequency)
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	229 //6 cycle period for DMA transfer out
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	230 //
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	231
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	232 void lc8951_run(lc8951 *context, uint32_t cycle)
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	233 {
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	234 for(; context->cycle < cycle; context->cycle += context->clock_step)
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	235 {
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	236 if (context->cycle >= context->decode_end) {
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	237 context->decode_end = CYCLE_NEVER;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	238 context->regs[IFSTAT] &= ~BIT_DECI;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	239 context->regs[STAT3] &= ~BIT_VALST;
2067 f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	240 if (context->ctrl0 & BIT_WRRQ) {
f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	241 uint16_t block_start = (context->regs[PTL] \| (context->regs[PTH] << 8)) & (sizeof(context->buffer)-1);
f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	242 for (int reg = HEAD0; reg < PTL; reg++)
f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	243 {
2419 0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	244 printf("Setting header reg %X to %X: %X\n", reg, block_start, context->buffer[block_start]);
2067 f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	245 context->regs[reg] =context->buffer[block_start++];
f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	246 block_start &= (sizeof(context->buffer)-1);
f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	247 }
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	248 }
2419 0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	249 printf("Decode done %X:%X:%X mode %X @ %u\n", context->regs[HEAD0], context->regs[HEAD1], context->regs[HEAD2], context->regs[HEAD3], context->cycle);
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	250 // This check is a hack until I properly implement error detection
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	251 if (context->regs[HEAD0] < 0x74 && (context->regs[HEAD0] & 0xF) < 0xA
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	252 && context->regs[HEAD1] < 0x60 && (context->regs[HEAD1] & 0xF) < 0xA
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	253 && context->regs[HEAD2] < 0x75 && (context->regs[HEAD2] & 0xF) < 0xA
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	254 && context->regs[HEAD3] < 3 && !(context->regs[STAT0] & (BIT_NOSYNC\|BIT_ILSYNC))
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	255 ) {
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	256
2153 8a30e44e8223 Minor CDC fix Michael Pavone <pavone@retrodev.com> parents: 2147 diff changeset	257 if (context->ctrl0 & (BIT_WRRQ\|BIT_ORQ\|BIT_PRQ)) {
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	258 context->regs[STAT0] \|= BIT_CRCOK;
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	259 }
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	260 context->regs[STAT1] = 0;
2153 8a30e44e8223 Minor CDC fix Michael Pavone <pavone@retrodev.com> parents: 2147 diff changeset	261 context->regs[STAT2] = 0x10;
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	262 } else {
2419 0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	263 if (context->ctrl0 & (BIT_EDCRQ\|BIT_ORQ\|BIT_PRQ)) {
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	264 context->regs[STAT0] \|= BIT_UCEBLK;
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	265 }
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	266 context->regs[STAT1] = 0xFF;
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	267 context->regs[STAT2] = 0xF2;
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	268 }
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	269 context->regs[STAT3] \|= BIT_WLONG;
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	270 }
2144 10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	271 if (context->cycle >= context->next_byte_cycle) {
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	272 if (context->byte_handler(context->handler_data, context->buffer[context->dac & (sizeof(context->buffer)-1)])) {
2144 10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	273 context->next_byte_cycle += context->cycles_per_byte;
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	274 context->dac++;
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	275 context->regs[DBCL]--;
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	276 if (context->regs[DBCL] == 0xFF) {
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	277 context->regs[DBCH]--;
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	278 if (context->regs[DBCH] == 0xFF) {
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	279 context->regs[IFSTAT] &= ~BIT_DTEI;
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	280 context->regs[IFSTAT] \|= BIT_DTBSY;
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	281 if (context->cycle != context->transfer_end) {
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	282 printf("Expected transfer end at %u but ended at %u\n", context->transfer_end, context->cycle);
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	283 }
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	284 context->transfer_end = CYCLE_NEVER;
2144 10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	285 context->next_byte_cycle = CYCLE_NEVER;
2231 8e6fb2c06024 Fix CDC transfer regression Michael Pavone <pavone@retrodev.com> parents: 2153 diff changeset	286 context->triggered = 0;
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	287 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	288 }
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	289 } else {
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	290 // pause transfer
2144 10e4439d8f13 Fix speed of CDC to PCM RAM DMA Michael Pavone <pavone@retrodev.com> parents: 2142 diff changeset	291 context->next_byte_cycle = CYCLE_NEVER;
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	292 context->transfer_end = CYCLE_NEVER;
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	293 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	294 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	295 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	296 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	297
2350 f8b5142c06aa Allow 68K to return mid-instruction. Adjust how 68K interrupt ack works so int2 busy flag timing is more correct. Fix some other SCD timing issues Michael Pavone <pavone@retrodev.com> parents: 2342 diff changeset	298 void lc8951_resume_transfer(lc8951 *context)
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	299 {
2231 8e6fb2c06024 Fix CDC transfer regression Michael Pavone <pavone@retrodev.com> parents: 2153 diff changeset	300 if (context->triggered && context->transfer_end == CYCLE_NEVER && (context->ifctrl & BIT_DOUTEN)) {
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	301 uint16_t transfer_size = context->regs[DBCL] \| (context->regs[DBCH] << 8);
2231 8e6fb2c06024 Fix CDC transfer regression Michael Pavone <pavone@retrodev.com> parents: 2153 diff changeset	302 context->transfer_end = context->cycle + transfer_size * context->cycles_per_byte;
8e6fb2c06024 Fix CDC transfer regression Michael Pavone <pavone@retrodev.com> parents: 2153 diff changeset	303 context->next_byte_cycle = context->cycle;
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	304 }
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	305 }
02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	306
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	307 void lc8951_write_byte(lc8951 *context, uint32_t cycle, int sector_offset, uint8_t byte)
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	308 {
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	309 lc8951_run(context, cycle);
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	310 uint16_t current_write_addr = context->regs[WAL] \| (context->regs[WAH] << 8);
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	311
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	312 uint8_t sync_detected = 0, sync_ignored = 0;
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	313 if (byte == 0) {
2342 9f0c67e5c50a Implement CD-ROM data sector scrambling/descrambling Michael Pavone <pavone@retrodev.com> parents: 2280 diff changeset	314 if (context->sync_counter == 11) {
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	315 if (context->ctrl1 & BIT_SYDEN) {
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	316 sync_detected = 1;
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	317 } else {
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	318 sync_ignored = 1;
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	319 }
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	320 context->sync_counter = 0;
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	321 } else {
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	322 context->sync_counter = 1;
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	323 }
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	324 } else if (byte == 0xFF && context->sync_counter) {
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	325 context->sync_counter++;
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	326 } else {
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	327 context->sync_counter = 0;
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	328 }
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	329
2342 9f0c67e5c50a Implement CD-ROM data sector scrambling/descrambling Michael Pavone <pavone@retrodev.com> parents: 2280 diff changeset	330 //TODO: figure out if chip tries to avoid descrambling sync signal
9f0c67e5c50a Implement CD-ROM data sector scrambling/descrambling Michael Pavone <pavone@retrodev.com> parents: 2280 diff changeset	331 if (context->ctrl1 & BIT_DSCREN) {
9f0c67e5c50a Implement CD-ROM data sector scrambling/descrambling Michael Pavone <pavone@retrodev.com> parents: 2280 diff changeset	332 byte = cdrom_scramble(&context->scrambler_lsfr, byte);
9f0c67e5c50a Implement CD-ROM data sector scrambling/descrambling Michael Pavone <pavone@retrodev.com> parents: 2280 diff changeset	333 }
9f0c67e5c50a Implement CD-ROM data sector scrambling/descrambling Michael Pavone <pavone@retrodev.com> parents: 2280 diff changeset	334
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	335 uint8_t sync_inserted = 0;
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	336 if (context->ctrl1 & BIT_SYIEN && context->sector_counter == 2351) {
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	337 sync_inserted = 1;
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	338 }
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	339
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	340
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	341 if (context->sector_counter < 4) {
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	342 //TODO: Handle SHDREN = 1
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	343 if ((context->ctrl0 & (BIT_DECEN\|BIT_WRRQ)) == (BIT_DECEN)) {
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	344 //monitor only mode
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	345 context->regs[HEAD0 + context->sector_counter] = byte;
2419 0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	346 if (context->sector_counter == 3) {
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	347 printf("Monitoring sector %02d:%02d:%02d\n", context->regs[HEAD0], context->regs[HEAD1], context->regs[HEAD2]);
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	348 }
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	349 } else {
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	350 if (context->sector_counter == 3) {
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	351 printf("Writing sector %02d:%02d:%02d @ %u\n",
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	352 context->buffer[(current_write_addr - 3) & (sizeof(context->buffer)-1)],
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	353 context->buffer[(current_write_addr - 2) & (sizeof(context->buffer)-1)],
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	354 context->buffer[(current_write_addr - 1) & (sizeof(context->buffer)-1)],
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	355 context->cycle);
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	356 }
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	357 }
2419 0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	358
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	359 }
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	360
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	361 if (sync_detected \|\| sync_inserted) {
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	362 //we've recevied the sync pattern for the next block
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	363 context->regs[STAT0] &= ~(BIT_ILSYNC \| BIT_NOSYNC \| BIT_LBLK \| BIT_SBLK);
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	364 if (sync_inserted && !(sync_detected \|\| sync_ignored)) {
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	365 context->regs[STAT0] \|= BIT_NOSYNC;
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	366 }
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	367 if (sync_detected && context->sector_counter != 2351) {
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	368 context->regs[STAT0] \|= BIT_ILSYNC;
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	369 }
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	370 context->sector_counter = 0;
2342 9f0c67e5c50a Implement CD-ROM data sector scrambling/descrambling Michael Pavone <pavone@retrodev.com> parents: 2280 diff changeset	371 context->scrambler_lsfr = 1;
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	372
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	373 //header/status regs no longer considered "valid"
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	374 context->regs[STAT3] \|= BIT_VALST;
2067 f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	375 //!DECI is set inactive at the same time as !VALST
f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	376 context->regs[IFSTAT] \|= BIT_DECI;
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	377 //clear error detection status bits
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	378 context->regs[STAT0] &= ~(BIT_CRCOK\|BIT_UCEBLK);
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	379 context->regs[STAT3] &= ~BIT_WLONG;
2067 f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	380 if (context->ctrl0 & BIT_DECEN) {
f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	381 if (context->ctrl0 & BIT_WRRQ) {
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	382 uint16_t block_start = current_write_addr + 1 - 2352;
2067 f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	383 context->regs[PTL] = block_start;
f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	384 context->regs[PTH] = block_start >> 8;
f22e04b69272 More CDC/CDD improvements Michael Pavone <pavone@retrodev.com> parents: 2066 diff changeset	385 }
2419 0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	386 printf("Decoding block starting at %X (WRRQ: %d, sector_offset: %X), current write address: %X @ %u\n", context->regs[PTL] \| (context->regs[PTH] << 8), !!(context->ctrl0 & BIT_WRRQ), sector_offset, current_write_addr, context->cycle);
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	387 //Based on mcd-verificator results on an MCD2 with LC89515
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	388 //value seems to be between ~132500 and ~133500
0871f555eff6 Fix some CD-ROM emulation issues and make timing better match my MCD2. Seems to fix or at least improve video playback in Iron Helix and Power Rangers Michael Pavone <pavone@retrodev.com> parents: 2350 diff changeset	389 context->decode_end = context->cycle + 133000 * context->clock_step;
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	390 }
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	391 } else {
2142 d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	392 context->sector_counter++;
d9151d0894c7 Fix some CD-ROM emulation issues Michael Pavone <pavone@retrodev.com> parents: 2131 diff changeset	393 context->sector_counter &= 0xFFF;
2130 28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	394 if (sync_ignored) {
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	395 context->regs[STAT0] \|= BIT_SBLK;
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	396 }
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	397 if (context->sector_counter == 2352) {
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	398 context->regs[STAT0] \|= BIT_LBLK;
28b6453cf7e3 Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset Michael Pavone <pavone@retrodev.com> parents: 2122 diff changeset	399 }
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	400 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	401 if ((context->ctrl0 & (BIT_DECEN\|BIT_WRRQ)) == (BIT_DECEN\|BIT_WRRQ)) {
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	402 context->buffer[current_write_addr & (sizeof(context->buffer)-1)] = byte;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	403 context->regs[WAL]++;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	404 if (!context->regs[WAL]) {
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	405 context->regs[WAH]++;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	406 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	407 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	408 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	409
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	410 uint32_t lc8951_next_interrupt(lc8951 *context)
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	411 {
2065 02a9846668d1 Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements Michael Pavone <pavone@retrodev.com> parents: 2062 diff changeset	412 if ((~context->regs[IFSTAT]) & context->ifctrl & (BIT_CMDI\|BIT_DTEI\|BIT_DECI)) {
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	413 //interrupt already pending
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	414 return context->cycle;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	415 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	416 uint32_t deci_cycle = CYCLE_NEVER;
2131 d90d92ce5cab Improve CDC decode timing accuracy Michael Pavone <pavone@retrodev.com> parents: 2130 diff changeset	417 if (context->ifctrl & BIT_DECIEN) {
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	418 deci_cycle = context->decode_end;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	419 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	420 uint32_t dtei_cycle = CYCLE_NEVER;
2131 d90d92ce5cab Improve CDC decode timing accuracy Michael Pavone <pavone@retrodev.com> parents: 2130 diff changeset	421 if (context->ifctrl & BIT_DTEIEN) {
2062 07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	422 dtei_cycle = context->transfer_end;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	423 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	424 return deci_cycle < dtei_cycle ? deci_cycle : dtei_cycle;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator Michael Pavone <pavone@retrodev.com> parents: 2058 diff changeset	425 }
2066 a61a8a87410c Fix a bunch of CDC/CDD related mcd-verificator failures Michael Pavone <pavone@retrodev.com> parents: 2065 diff changeset	426
a61a8a87410c Fix a bunch of CDC/CDD related mcd-verificator failures Michael Pavone <pavone@retrodev.com> parents: 2065 diff changeset	427 void lc8951_adjust_cycles(lc8951 *context, uint32_t deduction)
a61a8a87410c Fix a bunch of CDC/CDD related mcd-verificator failures Michael Pavone <pavone@retrodev.com> parents: 2065 diff changeset	428 {
2073 c69e42444f96 Fix some cycle adjustment stuff and an off-by one on hte TOCT response Michael Pavone <pavone@retrodev.com> parents: 2067 diff changeset	429 printf("CDC deduction of %u cycles @ %u, ", deduction, context->cycle);
c69e42444f96 Fix some cycle adjustment stuff and an off-by one on hte TOCT response Michael Pavone <pavone@retrodev.com> parents: 2067 diff changeset	430 context->cycle -= deduction;
2066 a61a8a87410c Fix a bunch of CDC/CDD related mcd-verificator failures Michael Pavone <pavone@retrodev.com> parents: 2065 diff changeset	431 if (context->decode_end != CYCLE_NEVER) {
a61a8a87410c Fix a bunch of CDC/CDD related mcd-verificator failures Michael Pavone <pavone@retrodev.com> parents: 2065 diff changeset	432 context->decode_end -= deduction;
a61a8a87410c Fix a bunch of CDC/CDD related mcd-verificator failures Michael Pavone <pavone@retrodev.com> parents: 2065 diff changeset	433 }
a61a8a87410c Fix a bunch of CDC/CDD related mcd-verificator failures Michael Pavone <pavone@retrodev.com> parents: 2065 diff changeset	434 if (context->transfer_end != CYCLE_NEVER) {
a61a8a87410c Fix a bunch of CDC/CDD related mcd-verificator failures Michael Pavone <pavone@retrodev.com> parents: 2065 diff changeset	435 context->transfer_end -= deduction;
a61a8a87410c Fix a bunch of CDC/CDD related mcd-verificator failures Michael Pavone <pavone@retrodev.com> parents: 2065 diff changeset	436 }
2147 4cd60eecb0b1 Fix LC8951 cycle adjustment for data transfer next byte tracking Michael Pavone <pavone@retrodev.com> parents: 2144 diff changeset	437 if (context->next_byte_cycle != CYCLE_NEVER) {
4cd60eecb0b1 Fix LC8951 cycle adjustment for data transfer next byte tracking Michael Pavone <pavone@retrodev.com> parents: 2144 diff changeset	438 context->next_byte_cycle -= deduction;
4cd60eecb0b1 Fix LC8951 cycle adjustment for data transfer next byte tracking Michael Pavone <pavone@retrodev.com> parents: 2144 diff changeset	439 }
2073 c69e42444f96 Fix some cycle adjustment stuff and an off-by one on hte TOCT response Michael Pavone <pavone@retrodev.com> parents: 2067 diff changeset	440 printf("cycle is now %u, decode_end %u, transfer_end %u\n", context->cycle, context->decode_end, context->transfer_end);
2066 a61a8a87410c Fix a bunch of CDC/CDD related mcd-verificator failures Michael Pavone <pavone@retrodev.com> parents: 2065 diff changeset	441 }
2280 9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	442
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	443 void lc8951_serialize(lc8951 context, serialize_buffer buf)
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	444 {
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	445 save_int32(buf, context->cycle);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	446 save_int32(buf, context->decode_end);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	447 save_int32(buf, context->transfer_end);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	448 save_int32(buf, context->next_byte_cycle);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	449 save_int16(buf, context->sector_counter);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	450 save_buffer8(buf, context->buffer, sizeof(context->buffer));
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	451 save_buffer8(buf, context->regs, sizeof(context->regs));
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	452 save_buffer8(buf, context->comin, sizeof(context->comin));
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	453 save_int16(buf, context->dac);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	454 save_int8(buf, context->comin_write);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	455 save_int8(buf, context->comin_count);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	456 save_int8(buf, context->ifctrl);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	457 save_int8(buf, context->ctrl0);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	458 save_int8(buf, context->ctrl1);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	459 save_int8(buf, context->ar);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	460 save_int8(buf, context->ar_mask);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	461 save_int8(buf, context->triggered);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	462 save_int8(buf, context->sync_counter);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	463 }
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	464
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	465 void lc8951_deserialize(deserialize_buffer buf, void vcontext)
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	466 {
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	467 lc8951 *context = vcontext;
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	468 context->cycle = load_int32(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	469 context->decode_end = load_int32(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	470 context->transfer_end = load_int32(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	471 context->next_byte_cycle = load_int32(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	472 context->sector_counter = load_int16(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	473 load_buffer8(buf, context->buffer, sizeof(context->buffer));
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	474 load_buffer8(buf, context->regs, sizeof(context->regs));
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	475 load_buffer8(buf, context->comin, sizeof(context->comin));
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	476 context->dac = load_int16(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	477 context->comin_write = load_int8(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	478 context->comin_count = load_int8(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	479 context->ifctrl = load_int8(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	480 context->ctrl0 = load_int8(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	481 context->ctrl1 = load_int8(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	482 context->ar = load_int8(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	483 context->ar_mask = load_int8(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	484 context->triggered = load_int8(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	485 context->sync_counter = load_int8(buf);
9ead0fe69d9b Implement savestate support for Sega CD Michael Pavone <pavone@retrodev.com> parents: 2265 diff changeset	486 }

Mercurial > repos > blastem

annotate lc8951.c @ 2496:187bc857a76a default tip