repos/blastem: blastem.c annotate

annotate blastem.c @ 150:3e68e517cc01

Do a sync when interrupt mask changes so we can recompute the next interrupt cycle. Also fix a bug in which the SR part of ORI to SR was not being performed.

author	Mike Pavone <pavone@retrodev.com>
date	Tue, 01 Jan 2013 09:40:17 -0800
parents	139e5dcd6aa3
children	42c031184e8a

rev	line source
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	1 #include "68kinst.h"
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	2 #include "m68k_to_x86.h"
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	3 #include "mem.h"
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	4 #include "vdp.h"
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	5 #include "render.h"
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	6 #include "blastem.h"
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	7 #include <stdio.h>
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	8 #include <stdlib.h>
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	9
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	10 #define CARTRIDGE_WORDS 0x200000
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	11 #define RAM_WORDS 32 * 1024
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	12 #define MCLKS_PER_68K 7
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	13 //TODO: Figure out the exact value for this
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	14 #define MCLKS_PER_FRAME (MCLKS_LINE*262)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	15 #define CYCLE_NEVER 0xFFFFFFFF
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	16
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	17 uint16_t cart[CARTRIDGE_WORDS];
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	18 uint16_t ram[RAM_WORDS];
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	19
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	20 io_port gamepad_1;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	21 io_port gamepad_2;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	22
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	23 #ifndef MIN
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	24 #define MIN(a,b) ((a) < (b) ? (a) : (b))
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	25 #endif
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	26
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	27 int load_rom(char * filename)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	28 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	29 FILE * f = fopen(filename, "rb");
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	30 if (!f) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	31 return 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	32 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	33 fseek(f, 0, SEEK_END);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	34 long filesize = ftell(f);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	35 fseek(f, 0, SEEK_SET);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	36 fread(cart, 2, MIN(filesize/2, CARTRIDGE_WORDS), f);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	37 fclose(f);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	38 for(unsigned short * cur = cart; cur - cart < (filesize/2); ++cur)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	39 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	40 cur = (cur >> 8) \| (*cur << 8);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	41 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	42 //TODO: Mirror ROM
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	43 return 1;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	44 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	45
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	46 uint16_t read_dma_value(uint32_t address)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	47 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	48 //addresses here are word addresses (i.e. bit 0 corresponds to A1), so no need to do div by 2
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	49 if (address < 0x200000) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	50 return cart[address];
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	51 } else if(address >= 0x700000) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	52 return ram[address & 0x7FFF];
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	53 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	54 //TODO: Figure out what happens when you try to DMA from weird adresses like IO or banked Z80 area
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	55 return 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	56 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	57
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	58 #define VINT_CYCLE ((MCLKS_LINE * 226)/MCLKS_PER_68K)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	59
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	60 m68k_context * sync_components(m68k_context * context)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	61 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	62 //TODO: Handle sync targets smaller than a single frame
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	63 vdp_context * v_context = context->next_context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	64 uint32_t mclks = context->current_cycle * MCLKS_PER_68K;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	65 if (mclks >= MCLKS_PER_FRAME) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	66 //printf("reached frame end \| 68K Cycles: %d, MCLK Cycles: %d\n", context->current_cycle, mclks);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	67 vdp_run_context(v_context, MCLKS_PER_FRAME);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	68 wait_render_frame(v_context);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	69 mclks -= MCLKS_PER_FRAME;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	70 vdp_adjust_cycles(v_context, MCLKS_PER_FRAME);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	71 io_adjust_cycles(&gamepad_1, context->current_cycle, MCLKS_PER_FRAME/MCLKS_PER_68K);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	72 io_adjust_cycles(&gamepad_2, context->current_cycle, MCLKS_PER_FRAME/MCLKS_PER_68K);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	73 context->current_cycle -= MCLKS_PER_FRAME/MCLKS_PER_68K;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	74 if (mclks) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	75 vdp_run_context(v_context, mclks);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	76 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	77 if (v_context->regs[REG_MODE_2] & 0x20 && ((context->status & 0x7) < 6)) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	78 if (context->int_cycle > VINT_CYCLE) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	79 context->int_cycle = VINT_CYCLE;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	80 context->int_num = 6;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	81 if (context->int_cycle < context->sync_cycle) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	82 context->target_cycle = context->int_cycle;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	83 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	84 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	85 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	86 context->int_cycle = 0xFFFFFFFF;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	87 context->target_cycle = context->sync_cycle;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	88 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	89 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	90 //printf("running VDP for %d cycles\n", mclks - v_context->cycles);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	91 vdp_run_context(v_context, mclks);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	92 if (v_context->regs[REG_MODE_2] & 0x20 && ((context->status & 0x7) < 6)) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	93 if (context->int_cycle > VINT_CYCLE) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	94 context->int_cycle = VINT_CYCLE;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	95 context->int_num = 6;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	96 if (context->int_cycle < context->sync_cycle && context->int_cycle < context->current_cycle) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	97 context->target_cycle = context->int_cycle;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	98 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	99 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	100 if (context->int_cycle <= context->current_cycle) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	101 context->int_cycle = CYCLE_NEVER;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	102 context->target_cycle = context->sync_cycle;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	103 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	104 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	105 context->int_cycle = CYCLE_NEVER;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	106 context->target_cycle = context->sync_cycle;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	107 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	108 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	109 return context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	110 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	111
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	112 m68k_context * vdp_port_write(uint32_t vdp_port, m68k_context * context, uint16_t value)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	113 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	114 //printf("vdp_port write: %X, value: %X, cycle: %d\n", vdp_port, value, context->current_cycle);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	115 sync_components(context);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	116 vdp_context * v_context = context->next_context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	117 if (vdp_port < 0x10) {
149 139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	118 int blocked;
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	119 if (vdp_port < 4) {
149 139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	120 while (vdp_data_port_write(v_context, value) < 0) {
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	121 while(v_context->flags & FLAG_DMA_RUN) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	122 vdp_run_dma_done(v_context, MCLKS_PER_FRAME);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	123 if (v_context->cycles >= MCLKS_PER_FRAME) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	124 wait_render_frame(v_context);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	125 vdp_adjust_cycles(v_context, MCLKS_PER_FRAME);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	126 io_adjust_cycles(&gamepad_1, v_context->cycles/MCLKS_PER_68K, MCLKS_PER_FRAME/MCLKS_PER_68K);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	127 io_adjust_cycles(&gamepad_2, v_context->cycles/MCLKS_PER_68K, MCLKS_PER_FRAME/MCLKS_PER_68K);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	128 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	129 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	130 context->current_cycle = v_context->cycles / MCLKS_PER_68K;
149 139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	131 }
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	132 } else if(vdp_port < 8) {
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	133 blocked = vdp_control_port_write(v_context, value);
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	134 if (blocked) {
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	135 while (blocked) {
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	136 while(v_context->flags & FLAG_DMA_RUN) {
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	137 vdp_run_dma_done(v_context, MCLKS_PER_FRAME);
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	138 if (v_context->cycles >= MCLKS_PER_FRAME) {
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	139 wait_render_frame(v_context);
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	140 vdp_adjust_cycles(v_context, MCLKS_PER_FRAME);
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	141 io_adjust_cycles(&gamepad_1, v_context->cycles/MCLKS_PER_68K, MCLKS_PER_FRAME/MCLKS_PER_68K);
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	142 io_adjust_cycles(&gamepad_2, v_context->cycles/MCLKS_PER_68K, MCLKS_PER_FRAME/MCLKS_PER_68K);
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	143 }
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	144 }
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	145 if (blocked < 0) {
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	146 blocked = vdp_control_port_write(v_context, value);
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	147 } else {
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	148 blocked = 0;
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	149 }
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	150 }
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress Mike Pavone <pavone@retrodev.com> parents: 144 diff changeset	151 context->current_cycle = v_context->cycles / MCLKS_PER_68K;
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	152 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	153 if (v_context->regs[REG_MODE_2] & 0x20 && ((context->status & 0x7) < 6)) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	154 if (context->int_cycle > VINT_CYCLE) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	155 context->int_cycle = VINT_CYCLE;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	156 context->int_num = 6;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	157 if (context->int_cycle < context->sync_cycle) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	158 context->target_cycle = context->int_cycle;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	159 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	160 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	161 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	162 context->int_cycle = 0xFFFFFFFF;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	163 context->target_cycle = context->sync_cycle;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	164 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	165 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	166 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	167 printf("Illegal write to HV Counter port %X\n", vdp_port);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	168 exit(1);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	169 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	170 context->current_cycle = v_context->cycles/MCLKS_PER_68K;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	171 } else if (vdp_port < 0x18) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	172 //TODO: Implement PSG
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	173 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	174 //TODO: Implement undocumented test register(s)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	175 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	176 return context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	177 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	178
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	179 m68k_context * vdp_port_read(uint32_t vdp_port, m68k_context * context)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	180 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	181 sync_components(context);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	182 vdp_context * v_context = context->next_context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	183 if (vdp_port < 0x10) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	184 if (vdp_port < 4) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	185 context->value = vdp_data_port_read(v_context);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	186 } else if(vdp_port < 8) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	187 context->value = vdp_control_port_read(v_context);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	188 } else {
137 0e7e1ccc0a81 Implemented HV counter Mike Pavone <pavone@retrodev.com> parents: 130 diff changeset	189 context->value = vdp_hv_counter_read(v_context);
0e7e1ccc0a81 Implemented HV counter Mike Pavone <pavone@retrodev.com> parents: 130 diff changeset	190 //printf("HV Counter: %X at cycle %d\n", context->value, v_context->cycles);
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	191 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	192 context->current_cycle = v_context->cycles/MCLKS_PER_68K;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	193 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	194 printf("Illegal read from PSG or test register port %X\n", vdp_port);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	195 exit(1);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	196 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	197 return context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	198 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	199
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	200 #define TH 0x40
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	201 #define TH_TIMEOUT 8000
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	202 #define Z80_ACK_DELAY 3 //TODO: Calculate this on the fly based on how synced up the Z80 and 68K clocks are
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	203
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	204 uint8_t reset = 1;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	205 uint8_t busreq = 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	206 uint8_t busack = 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	207 uint32_t busack_cycle = CYCLE_NEVER;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	208 uint8_t new_busack = 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	209
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	210 void io_adjust_cycles(io_port * pad, uint32_t current_cycle, uint32_t deduction)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	211 {
89 9757b4c6c33f Minor joypad fix and commeount out some debug printfs Mike Pavone <pavone@retrodev.com> parents: 88 diff changeset	212 /*uint8_t control = pad->control \| 0x80;
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	213 uint8_t th = control & pad->output;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	214 if (pad->input[GAMEPAD_TH0] \|\| pad->input[GAMEPAD_TH1]) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	215 printf("adjust_cycles \| control: %X, TH: %X, GAMEPAD_TH0: %X, GAMEPAD_TH1: %X, TH Counter: %d, Timeout: %d, Cycle: %d\n", control, th, pad->input[GAMEPAD_TH0], pad->input[GAMEPAD_TH1], pad->th_counter,pad->timeout_cycle, current_cycle);
89 9757b4c6c33f Minor joypad fix and commeount out some debug printfs Mike Pavone <pavone@retrodev.com> parents: 88 diff changeset	216 }*/
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	217 if (current_cycle >= pad->timeout_cycle) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	218 pad->th_counter = 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	219 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	220 pad->timeout_cycle -= deduction;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	221 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	222 if (busack_cycle < CYCLE_NEVER && current_cycle < busack_cycle) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	223 busack_cycle -= deduction;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	224 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	225 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	226
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	227 void io_data_write(io_port * pad, m68k_context * context, uint8_t value)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	228 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	229 if (pad->control & TH) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	230 //check if TH has changed
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	231 if ((pad->output & TH) ^ (value & TH)) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	232 if (context->current_cycle >= pad->timeout_cycle) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	233 pad->th_counter = 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	234 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	235 if (!(value & TH)) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	236 pad->th_counter++;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	237 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	238 pad->timeout_cycle = context->current_cycle + TH_TIMEOUT;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	239 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	240 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	241 pad->output = value;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	242 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	243
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	244 void io_data_read(io_port * pad, m68k_context * context)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	245 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	246 uint8_t control = pad->control \| 0x80;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	247 uint8_t th = control & pad->output;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	248 uint8_t input;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	249 if (context->current_cycle >= pad->timeout_cycle) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	250 pad->th_counter = 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	251 }
89 9757b4c6c33f Minor joypad fix and commeount out some debug printfs Mike Pavone <pavone@retrodev.com> parents: 88 diff changeset	252 /*if (pad->input[GAMEPAD_TH0] \|\| pad->input[GAMEPAD_TH1]) {
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	253 printf("io_data_read \| control: %X, TH: %X, GAMEPAD_TH0: %X, GAMEPAD_TH1: %X, TH Counter: %d, Timeout: %d, Cycle: %d\n", control, th, pad->input[GAMEPAD_TH0], pad->input[GAMEPAD_TH1], pad->th_counter,pad->timeout_cycle, context->current_cycle);
89 9757b4c6c33f Minor joypad fix and commeount out some debug printfs Mike Pavone <pavone@retrodev.com> parents: 88 diff changeset	254 }*/
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	255 if (th) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	256 if (pad->th_counter == 2) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	257 input = pad->input[GAMEPAD_EXTRA];
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	258 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	259 input = pad->input[GAMEPAD_TH1];
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	260 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	261 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	262 if (pad->th_counter == 2) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	263 input = pad->input[GAMEPAD_TH0] \| 0xF;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	264 } else if(pad->th_counter == 3) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	265 input = pad->input[GAMEPAD_TH0] & 0x30;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	266 } else {
89 9757b4c6c33f Minor joypad fix and commeount out some debug printfs Mike Pavone <pavone@retrodev.com> parents: 88 diff changeset	267 input = pad->input[GAMEPAD_TH0] \| 0xC;
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	268 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	269 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	270 context->value = ((~input) & (~control)) \| (pad->output & control);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	271 /*if (pad->input[GAMEPAD_TH0] \|\| pad->input[GAMEPAD_TH1]) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	272 printf ("value: %X\n", context->value);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	273 }*/
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	274 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	275
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	276 m68k_context * io_write(uint32_t location, m68k_context * context, uint8_t value)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	277 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	278 if (location < 0x100) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	279 switch(location/2)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	280 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	281 case 0x1:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	282 io_data_write(&gamepad_1, context, value);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	283 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	284 case 0x2:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	285 io_data_write(&gamepad_2, context, value);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	286 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	287 case 0x3://PORT C Data
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	288 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	289 case 0x4:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	290 gamepad_1.control = value;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	291 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	292 case 0x5:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	293 gamepad_2.control = value;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	294 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	295 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	296 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	297 if (location == 0x1100) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	298 if (busack_cycle > context->current_cycle) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	299 busack = new_busack;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	300 busack_cycle = CYCLE_NEVER;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	301 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	302 if (value & 1) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	303 busreq = 1;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	304 if(!reset) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	305 busack_cycle = context->current_cycle + Z80_ACK_DELAY;
115 11d72e471104 Fix Z80 busreq logic Mike Pavone <pavone@retrodev.com> parents: 103 diff changeset	306 new_busack = 0;
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	307 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	308 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	309 busreq = 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	310 busack_cycle = CYCLE_NEVER;
115 11d72e471104 Fix Z80 busreq logic Mike Pavone <pavone@retrodev.com> parents: 103 diff changeset	311 busack = 1;
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	312 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	313 } else if (location == 0x1200) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	314 if (value & 1) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	315 if (reset && busreq) {
115 11d72e471104 Fix Z80 busreq logic Mike Pavone <pavone@retrodev.com> parents: 103 diff changeset	316 new_busack = 0;
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	317 busack_cycle = context->current_cycle + Z80_ACK_DELAY;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	318 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	319 reset = 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	320 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	321 reset = 1;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	322 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	323 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	324 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	325 return context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	326 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	327
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	328 m68k_context * io_write_w(uint32_t location, m68k_context * context, uint16_t value)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	329 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	330 if (location < 0x100) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	331 switch(location/2)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	332 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	333 case 0x1:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	334 io_data_write(&gamepad_1, context, value);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	335 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	336 case 0x2:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	337 io_data_write(&gamepad_2, context, value);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	338 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	339 case 0x3://PORT C Data
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	340 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	341 case 0x4:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	342 gamepad_1.control = value;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	343 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	344 case 0x5:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	345 gamepad_2.control = value;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	346 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	347 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	348 } else {
144 177ba1a5af9c Comment out some debug printfs Mike Pavone <pavone@retrodev.com> parents: 137 diff changeset	349 //printf("IO Write of %X to %X @ %d\n", value, location, context->current_cycle);
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	350 if (location == 0x1100) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	351 if (busack_cycle > context->current_cycle) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	352 busack = new_busack;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	353 busack_cycle = CYCLE_NEVER;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	354 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	355 if (value & 0x100) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	356 busreq = 1;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	357 if(!reset) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	358 busack_cycle = context->current_cycle + Z80_ACK_DELAY;
115 11d72e471104 Fix Z80 busreq logic Mike Pavone <pavone@retrodev.com> parents: 103 diff changeset	359 new_busack = 0;
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	360 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	361 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	362 busreq = 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	363 busack_cycle = CYCLE_NEVER;
115 11d72e471104 Fix Z80 busreq logic Mike Pavone <pavone@retrodev.com> parents: 103 diff changeset	364 busack = 1;
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	365 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	366 } else if (location == 0x1200) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	367 if (value & 0x100) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	368 if (reset && busreq) {
115 11d72e471104 Fix Z80 busreq logic Mike Pavone <pavone@retrodev.com> parents: 103 diff changeset	369 new_busack = 0;
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	370 busack_cycle = context->current_cycle + Z80_ACK_DELAY;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	371 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	372 reset = 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	373 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	374 reset = 1;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	375 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	376 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	377 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	378 return context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	379 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	380
130 0bdbffa9fe90 Make version register return correct value for USA Mike Pavone <pavone@retrodev.com> parents: 115 diff changeset	381 #define USA 0x80
0bdbffa9fe90 Make version register return correct value for USA Mike Pavone <pavone@retrodev.com> parents: 115 diff changeset	382 #define JAP 0x00
0bdbffa9fe90 Make version register return correct value for USA Mike Pavone <pavone@retrodev.com> parents: 115 diff changeset	383 #define EUR 0xC0
0bdbffa9fe90 Make version register return correct value for USA Mike Pavone <pavone@retrodev.com> parents: 115 diff changeset	384 #define NO_DISK 0x20
0bdbffa9fe90 Make version register return correct value for USA Mike Pavone <pavone@retrodev.com> parents: 115 diff changeset	385 uint8_t version_reg = NO_DISK \| USA;
0bdbffa9fe90 Make version register return correct value for USA Mike Pavone <pavone@retrodev.com> parents: 115 diff changeset	386
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	387 m68k_context * io_read(uint32_t location, m68k_context * context)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	388 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	389 if (location < 0x100) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	390 switch(location/2)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	391 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	392 case 0x0:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	393 //version bits should be 0 for now since we're not emulating TMSS
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	394 //Not sure about the other bits
130 0bdbffa9fe90 Make version register return correct value for USA Mike Pavone <pavone@retrodev.com> parents: 115 diff changeset	395 context->value = version_reg;
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	396 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	397 case 0x1:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	398 io_data_read(&gamepad_1, context);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	399 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	400 case 0x2:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	401 io_data_read(&gamepad_2, context);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	402 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	403 case 0x3://PORT C Data
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	404 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	405 case 0x4:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	406 context->value = gamepad_1.control;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	407 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	408 case 0x5:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	409 context->value = gamepad_2.control;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	410 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	411 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	412 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	413 if (location == 0x1100) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	414 if (busack_cycle > context->current_cycle) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	415 busack = new_busack;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	416 busack_cycle = CYCLE_NEVER;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	417 }
115 11d72e471104 Fix Z80 busreq logic Mike Pavone <pavone@retrodev.com> parents: 103 diff changeset	418 context->value = reset \|\| busack;
144 177ba1a5af9c Comment out some debug printfs Mike Pavone <pavone@retrodev.com> parents: 137 diff changeset	419 //printf("Byte read of BUSREQ returned %d @ %d (reset: %d, busack: %d)\n", context->value, context->current_cycle, reset, busack);
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	420 } else if (location == 0x1200) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	421 context->value = !reset;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	422 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	423 printf("Byte read of unknown IO location: %X\n", location);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	424 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	425 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	426 return context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	427 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	428
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	429 m68k_context * io_read_w(uint32_t location, m68k_context * context)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	430 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	431 if (location < 0x100) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	432 switch(location/2)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	433 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	434 case 0x0:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	435 //version bits should be 0 for now since we're not emulating TMSS
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	436 //Not sure about the other bits
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	437 context->value = 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	438 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	439 case 0x1:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	440 io_data_read(&gamepad_1, context);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	441 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	442 case 0x2:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	443 io_data_read(&gamepad_2, context);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	444 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	445 case 0x3://PORT C Data
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	446 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	447 case 0x4:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	448 context->value = gamepad_1.control;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	449 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	450 case 0x5:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	451 context->value = gamepad_2.control;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	452 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	453 case 0x6:
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	454 //PORT C Control
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	455 context->value = 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	456 break;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	457 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	458 context->value = context->value \| (context->value << 8);
89 9757b4c6c33f Minor joypad fix and commeount out some debug printfs Mike Pavone <pavone@retrodev.com> parents: 88 diff changeset	459 //printf("Word read to %X returned %d\n", location, context->value);
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	460 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	461 if (location == 0x1100) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	462 if (busack_cycle > context->current_cycle) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	463 busack = new_busack;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	464 busack_cycle = CYCLE_NEVER;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	465 }
115 11d72e471104 Fix Z80 busreq logic Mike Pavone <pavone@retrodev.com> parents: 103 diff changeset	466 context->value = (reset \|\| busack) << 8;
144 177ba1a5af9c Comment out some debug printfs Mike Pavone <pavone@retrodev.com> parents: 137 diff changeset	467 //printf("Word read of BUSREQ returned %d\n", context->value);
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	468 } else if (location == 0x1200) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	469 context->value = (!reset) << 8;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	470 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	471 printf("Word read of unknown IO location: %X\n", location);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	472 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	473 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	474 return context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	475 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	476
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	477 int main(int argc, char ** argv)
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	478 {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	479 if (argc < 2) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	480 fputs("Usage: blastem FILENAME\n", stderr);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	481 return 1;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	482 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	483 if(!load_rom(argv[1])) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	484 fprintf(stderr, "Failed to open %s for reading\n", argv[1]);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	485 return 1;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	486 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	487 int width = 320;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	488 int height = 240;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	489 if (argc > 2) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	490 width = atoi(argv[2]);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	491 if (argc > 3) {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	492 height = atoi(argv[3]);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	493 } else {
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	494 height = (width/320) * 240;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	495 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	496 }
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	497 render_init(width, height);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	498
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	499 x86_68k_options opts;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	500 m68k_context context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	501 vdp_context v_context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	502
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	503 init_x86_68k_opts(&opts);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	504 init_68k_context(&context, opts.native_code_map, &opts);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	505 init_vdp_context(&v_context);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	506 context.next_context = &v_context;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	507 //cartridge ROM
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	508 context.mem_pointers[0] = cart;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	509 context.target_cycle = context.sync_cycle = MCLKS_PER_FRAME/MCLKS_PER_68K;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	510 //work RAM
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	511 context.mem_pointers[1] = ram;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	512 uint32_t address;
103 a71544cd01ea Don't pre-emptively translate code at interrupt vectors as some PD ROMs have these pointing at junk. Need some kind of heuristic for detecting garbage if I'm going to translate them ahead of time by default. Mike Pavone <pavone@retrodev.com> parents: 95 diff changeset	513 /*address = cart[0x68/2] << 16 \| cart[0x6A/2];
95 dd3c680c618c Initial work on allowing dynamic branches and code in RAM plus a small fix to effective address decoding Mike Pavone <pavone@retrodev.com> parents: 89 diff changeset	514 translate_m68k_stream(address, &context);
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	515 address = cart[0x70/2] << 16 \| cart[0x72/2];
95 dd3c680c618c Initial work on allowing dynamic branches and code in RAM plus a small fix to effective address decoding Mike Pavone <pavone@retrodev.com> parents: 89 diff changeset	516 translate_m68k_stream(address, &context);
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	517 address = cart[0x78/2] << 16 \| cart[0x7A/2];
103 a71544cd01ea Don't pre-emptively translate code at interrupt vectors as some PD ROMs have these pointing at junk. Need some kind of heuristic for detecting garbage if I'm going to translate them ahead of time by default. Mike Pavone <pavone@retrodev.com> parents: 95 diff changeset	518 translate_m68k_stream(address, &context);*/
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	519 address = cart[2] << 16 \| cart[3];
95 dd3c680c618c Initial work on allowing dynamic branches and code in RAM plus a small fix to effective address decoding Mike Pavone <pavone@retrodev.com> parents: 89 diff changeset	520 translate_m68k_stream(address, &context);
88 c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	521 m68k_reset(&context);
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	522 return 0;
c339559f1d4f Forgot to add blastem main file earlier Mike Pavone <pavone@retrodev.com> parents: diff changeset	523 }

Mercurial > repos > blastem

annotate blastem.c @ 150:3e68e517cc01