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Implemented IR and undefined bits of info word for address error exception frames
author Michael Pavone <pavone@retrodev.com>
date Wed, 27 Apr 2016 21:39:17 -0700
parents 928442068afe
children bf63cbf1d7bb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 Copyright 2013 Michael Pavone
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3 This file is part of BlastEm.
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
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5 */
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6 #ifndef VDP_H_
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7 #define VDP_H_
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8
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9 #include <stdint.h>
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10 #include <stdio.h>
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11
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12 #define VDP_REGS 24
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13 #define CRAM_SIZE 64
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14 #define VSRAM_SIZE 40
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15 #define VRAM_SIZE (64*1024)
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16 #define LINEBUF_SIZE 320
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17 #define FRAMEBUF_ENTRIES (320+27)*(240+27) //PAL active display + full border
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18 #define MAX_DRAWS 40
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19 #define MAX_DRAWS_H32 32
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20 #define MAX_SPRITES_LINE 20
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21 #define MAX_SPRITES_LINE_H32 16
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22 #define MAX_SPRITES_FRAME 80
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23 #define MAX_SPRITES_FRAME_H32 64
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25 #define FBUF_SHADOW 0x0001
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26 #define FBUF_HILIGHT 0x0010
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27 #define DBG_SHADOW 0x10
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28 #define DBG_HILIGHT 0x20
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29 #define DBG_PRIORITY 0x8
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30 #define DBG_SRC_MASK 0x7
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31 #define DBG_SRC_A 0x1
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32 #define DBG_SRC_W 0x2
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33 #define DBG_SRC_B 0x3
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34 #define DBG_SRC_S 0x4
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35 #define DBG_SRC_BG 0x0
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36
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37 #define MCLKS_LINE 3420
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38
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39 #define FLAG_DOT_OFLOW 0x01
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40 #define FLAG_CAN_MASK 0x02
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41 #define FLAG_MASKED 0x04
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42 #define FLAG_WINDOW 0x08
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43 #define FLAG_PENDING 0x10
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44 #define FLAG_READ_FETCHED 0x20
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45 #define FLAG_DMA_RUN 0x40
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46 #define FLAG_DMA_PROG 0x80
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47
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48 #define FLAG2_VINT_PENDING 0x01
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49 #define FLAG2_HINT_PENDING 0x02
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50 #define FLAG2_READ_PENDING 0x04
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51 #define FLAG2_SPRITE_COLLIDE 0x08
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52 #define FLAG2_REGION_PAL 0x10
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54 #define DISPLAY_ENABLE 0x40
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55
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56 enum {
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57 REG_MODE_1=0,
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58 REG_MODE_2,
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59 REG_SCROLL_A,
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60 REG_WINDOW,
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61 REG_SCROLL_B,
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62 REG_SAT,
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63 REG_BG_COLOR=7,
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64 REG_HINT=0xA,
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65 REG_MODE_3,
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66 REG_MODE_4,
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67 REG_HSCROLL,
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68 REG_AUTOINC=0xF,
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69 REG_SCROLL,
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70 REG_WINDOW_H,
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71 REG_WINDOW_V,
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72 REG_DMALEN_L,
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73 REG_DMALEN_H,
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74 REG_DMASRC_L,
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75 REG_DMASRC_M,
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76 REG_DMASRC_H
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77 } vdp_regs;
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78
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79 //Mode reg 1
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80 #define BIT_HINT_EN 0x10
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81 #define BIT_PAL_SEL 0x04
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82 #define BIT_HVC_LATCH 0x02
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83 #define BIT_DISP_DIS 0x01
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84
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85 //Mode reg 2
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86 #define BIT_DISP_EN 0x40
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87 #define BIT_VINT_EN 0x20
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88 #define BIT_DMA_ENABLE 0x10
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89 #define BIT_PAL 0x08
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90 #define BIT_MODE_5 0x04
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91
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92 //Mode reg 3
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93 #define BIT_EINT_EN 0x10
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94 #define BIT_VSCROLL 0x04
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95
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96 //Mode reg 4
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97 #define BIT_H40 0x01
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98 #define BIT_HILIGHT 0x8
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99 #define BIT_DOUBLE_RES 0x4
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100 #define BIT_INTERLACE 0x2
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101
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102 typedef struct {
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103 uint16_t address;
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104 int16_t x_pos;
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105 uint8_t pal_priority;
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106 uint8_t h_flip;
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107 } sprite_draw;
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108
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109 typedef struct {
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110 uint8_t size;
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111 uint8_t index;
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112 int16_t y;
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113 } sprite_info;
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114
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115 #define FIFO_SIZE 4
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116
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117 typedef struct {
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118 uint32_t cycle;
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119 uint16_t address;
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120 uint16_t value;
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121 uint8_t cd;
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122 uint8_t partial;
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123 } fifo_entry;
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124
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125 typedef struct {
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126 fifo_entry fifo[FIFO_SIZE];
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127 int32_t fifo_write;
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128 int32_t fifo_read;
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129 uint16_t address;
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130 uint8_t cd;
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131 uint8_t flags;
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132 uint8_t regs[VDP_REGS];
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133 //cycle count in MCLKs
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134 uint32_t cycles;
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135 uint32_t pending_vint_start;
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136 uint32_t pending_hint_start;
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137 uint8_t *vdpmem;
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138 //stores 2-bit palette + 4-bit palette index + priority for current sprite line
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139 uint8_t *linebuf;
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140 //stores 12-bit color + shadow/highlight bits
426
add9e2f5c0e3 Make VDP render in native pixel format of the renderer for a modest performance gain and to make it easier to use OpenGL for rendering
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parents: 424
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141 void *framebuf;
add9e2f5c0e3 Make VDP render in native pixel format of the renderer for a modest performance gain and to make it easier to use OpenGL for rendering
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parents: 424
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142 void *oddbuf;
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parents: 424
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143 void *evenbuf;
20
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144 uint16_t cram[CRAM_SIZE];
426
add9e2f5c0e3 Make VDP render in native pixel format of the renderer for a modest performance gain and to make it easier to use OpenGL for rendering
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parents: 424
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145 uint32_t colors[CRAM_SIZE*3];
437
afbea09d7fb4 Restore one of the VDP debugging modes
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parents: 436
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146 uint32_t debugcolors[1 << (3 + 1 + 1 + 1)];//3 bits for source, 1 bit for priority, 1 bit for shadow, 1 bit for hilight
20
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147 uint16_t vsram[VSRAM_SIZE];
710
4cd8823f79e3 First pass at emulating a vscroll latch. Titan's Overdrive demo seems to depend on the scroll value being latched early in the line before the HINT gets a chance to change it
Michael Pavone <pavone@retrodev.com>
parents: 697
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148 uint16_t vscroll_latch[2];
697
7f96bd1cb1be Sync fixes and logging to fix more sync issues
Michael Pavone <pavone@retrodev.com>
parents: 680
diff changeset
149 uint32_t frame;
622
b76d2a628ab9 Partially working switch to having a vcounter and hslot counter in the context rather than trying to derive them from the cycle count. This should allow for more accurate handling of mid screen mode switches. Interrupt timing is broken currently though
Michael Pavone <pavone@retrodev.com>
parents: 494
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150 uint16_t vcounter;
20
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151 uint16_t hscroll_a;
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152 uint16_t hscroll_b;
922
913a6336ce20 Shift slot number to slot behavior mapping by six slots in H40 mode. This makes the line change slot align with the point at which the display turns on and off at the end of the active display area. Also fixed a regression in which an external slot got accidentally changed into a sprite draw slot
Michael Pavone <pavone@retrodev.com>
parents: 884
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153 uint8_t hslot; //hcounter/2
622
b76d2a628ab9 Partially working switch to having a vcounter and hslot counter in the context rather than trying to derive them from the cycle count. This should allow for more accurate handling of mid screen mode switches. Interrupt timing is broken currently though
Michael Pavone <pavone@retrodev.com>
parents: 494
diff changeset
154 uint8_t latched_mode;
20
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155 uint8_t sprite_index;
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156 uint8_t sprite_draws;
21
72ce60cb1711 Sprites somewhat less broken
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parents: 20
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157 int8_t slot_counter;
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parents: 20
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158 int8_t cur_slot;
20
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159 sprite_draw sprite_draw_list[MAX_DRAWS];
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160 sprite_info sprite_info_list[MAX_SPRITES_LINE];
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161 uint16_t col_1;
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162 uint16_t col_2;
480
0737953132ad Implement HV counter latch
Mike Pavone <pavone@retrodev.com>
parents: 478
diff changeset
163 uint16_t hv_latch;
980
928442068afe Implemented VDP read prefetch and made DMA copy not use the FIFO any more. Now up to 114 out of 122 passing on VDP FIFO Test ROM
Michael Pavone <pavone@retrodev.com>
parents: 953
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164 uint16_t prefetch;
20
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165 uint8_t v_offset;
131
8fc8e46be691 Fix bug that was causing DMA fills to lock up under certain circumstances
Mike Pavone <pavone@retrodev.com>
parents: 75
diff changeset
166 uint8_t dma_cd;
317
e5e8b48ad157 Initial stab at horizontal interrupts and improving accuracy of vertical interrupts. Also added the VINT pending flag to status port.
Mike Pavone <pavone@retrodev.com>
parents: 230
diff changeset
167 uint8_t hint_counter;
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Mike Pavone <pavone@retrodev.com>
parents: 230
diff changeset
168 uint8_t flags2;
413
36fbbced25c2 Initial work on interlace
Mike Pavone <pavone@retrodev.com>
parents: 337
diff changeset
169 uint8_t double_res;
426
add9e2f5c0e3 Make VDP render in native pixel format of the renderer for a modest performance gain and to make it easier to use OpenGL for rendering
Mike Pavone <pavone@retrodev.com>
parents: 424
diff changeset
170 uint8_t b32;
436
e341fd5aa996 Implement the scroll ring buffer properly without memcpy
Mike Pavone <pavone@retrodev.com>
parents: 426
diff changeset
171 uint8_t buf_a_off;
e341fd5aa996 Implement the scroll ring buffer properly without memcpy
Mike Pavone <pavone@retrodev.com>
parents: 426
diff changeset
172 uint8_t buf_b_off;
437
afbea09d7fb4 Restore one of the VDP debugging modes
Mike Pavone <pavone@retrodev.com>
parents: 436
diff changeset
173 uint8_t debug;
722
8f5339961903 Restore the other 2 debug display modes
Michael Pavone <pavone@retrodev.com>
parents: 717
diff changeset
174 uint8_t debug_pal;
20
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175 uint8_t *tmp_buf_a;
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176 uint8_t *tmp_buf_b;
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177 } vdp_context;
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178
623
66cc60215e5c Fix most of the breakage caused by the vcounter/hcounter changes
Michael Pavone <pavone@retrodev.com>
parents: 622
diff changeset
179 void init_vdp_context(vdp_context * context, uint8_t region_pal);
884
252dfd29831d Selecting a second game from the menu now works
Michael Pavone <pavone@retrodev.com>
parents: 722
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180 void vdp_free(vdp_context *context);
20
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181 void vdp_run_context(vdp_context * context, uint32_t target_cycles);
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182 //runs from current cycle count to VBLANK for the current mode, returns ending cycle count
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183 uint32_t vdp_run_to_vblank(vdp_context * context);
75
108e587165c0 Implement DMA (untested)
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parents: 65
diff changeset
184 //runs until the target cycle is reached or the current DMA operation has completed, whicever comes first
108e587165c0 Implement DMA (untested)
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parents: 65
diff changeset
185 void vdp_run_dma_done(vdp_context * context, uint32_t target_cycles);
424
7e8e179116af Add support for loading GST format savestates
Mike Pavone <pavone@retrodev.com>
parents: 413
diff changeset
186 uint8_t vdp_load_gst(vdp_context * context, FILE * state_file);
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 437
diff changeset
187 uint8_t vdp_save_gst(vdp_context * context, FILE * outfile);
75
108e587165c0 Implement DMA (untested)
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parents: 65
diff changeset
188 int vdp_control_port_write(vdp_context * context, uint16_t value);
149
139e5dcd6aa3 Make writes to control and data port block when DMA is in progress
Mike Pavone <pavone@retrodev.com>
parents: 138
diff changeset
189 int vdp_data_port_write(vdp_context * context, uint16_t value);
470
541c1ae8abf3 Properly delay 68K on VDP reads. Dummy VDP test port implementation. Initial stab at handling undefined bits of VSRAM and CRAM.
Mike Pavone <pavone@retrodev.com>
parents: 467
diff changeset
190 void vdp_test_port_write(vdp_context * context, uint16_t value);
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 43
diff changeset
191 uint16_t vdp_control_port_read(vdp_context * context);
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 43
diff changeset
192 uint16_t vdp_data_port_read(vdp_context * context);
137
0e7e1ccc0a81 Implemented HV counter
Mike Pavone <pavone@retrodev.com>
parents: 131
diff changeset
193 uint16_t vdp_hv_counter_read(vdp_context * context);
470
541c1ae8abf3 Properly delay 68K on VDP reads. Dummy VDP test port implementation. Initial stab at handling undefined bits of VSRAM and CRAM.
Mike Pavone <pavone@retrodev.com>
parents: 467
diff changeset
194 uint16_t vdp_test_port_read(vdp_context * context);
65
aef6302770c2 Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
Mike Pavone <pavone@retrodev.com>
parents: 56
diff changeset
195 void vdp_adjust_cycles(vdp_context * context, uint32_t deduction);
317
e5e8b48ad157 Initial stab at horizontal interrupts and improving accuracy of vertical interrupts. Also added the VINT pending flag to status port.
Mike Pavone <pavone@retrodev.com>
parents: 230
diff changeset
196 uint32_t vdp_next_hint(vdp_context * context);
e5e8b48ad157 Initial stab at horizontal interrupts and improving accuracy of vertical interrupts. Also added the VINT pending flag to status port.
Mike Pavone <pavone@retrodev.com>
parents: 230
diff changeset
197 uint32_t vdp_next_vint(vdp_context * context);
333
f16136a3835d Update Z80 vint timing
Mike Pavone <pavone@retrodev.com>
parents: 327
diff changeset
198 uint32_t vdp_next_vint_z80(vdp_context * context);
953
08346262990b Remove the int number argument to vdp_int_ack since it is no longer used
Michael Pavone <pavone@retrodev.com>
parents: 922
diff changeset
199 void vdp_int_ack(vdp_context * context);
322
8e2fa485c0f2 Remove z80_ram reference in SDL renderer to get stateview compiling again. Print out the sprite list in stateview.
Mike Pavone <pavone@retrodev.com>
parents: 317
diff changeset
200 void vdp_print_sprite_table(vdp_context * context);
327
1b00258b1f29 Added some basic VDP debugging features to debugger. Fixed DMA enable bug
Mike Pavone <pavone@retrodev.com>
parents: 322
diff changeset
201 void vdp_print_reg_explain(vdp_context * context);
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 437
diff changeset
202 void latch_mode(vdp_context * context);
623
66cc60215e5c Fix most of the breakage caused by the vcounter/hcounter changes
Michael Pavone <pavone@retrodev.com>
parents: 622
diff changeset
203 uint32_t vdp_cycles_to_frame_end(vdp_context * context);
697
7f96bd1cb1be Sync fixes and logging to fix more sync issues
Michael Pavone <pavone@retrodev.com>
parents: 680
diff changeset
204 uint32_t vdp_frame_end_line(vdp_context *context);
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 437
diff changeset
205
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 437
diff changeset
206 extern int32_t color_map[1 << 12];
20
f664eeb55cb4 Mostly broken VDP core and savestate viewer
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207
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208 #endif //VDP_H_