Mercurial > repos > blastem
annotate vdp.h @ 354:15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
author | Mike Pavone <pavone@retrodev.com> |
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date | Thu, 23 May 2013 23:42:42 -0700 |
parents | f8c6f8684cd6 |
children | 36fbbced25c2 |
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1 #ifndef VDP_H_ |
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2 #define VDP_H_ |
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3 |
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4 #include <stdint.h> |
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5 #include <stdio.h> |
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6 |
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7 #define VDP_REGS 24 |
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8 #define CRAM_SIZE 64 |
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9 #define VSRAM_SIZE 40 |
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10 #define VRAM_SIZE (64*1024) |
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11 #define LINEBUF_SIZE 320 |
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12 #define FRAMEBUF_ENTRIES (320+27)*(240+27) //PAL active display + full border |
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13 #define FRAMEBUF_SIZE (FRAMEBUF_ENTRIES*sizeof(uint16_t)) |
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14 #define MAX_DRAWS 40 |
37 | 15 #define MAX_DRAWS_H32 32 |
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16 #define MAX_SPRITES_LINE 20 |
37 | 17 #define MAX_SPRITES_LINE_H32 16 |
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18 #define MAX_SPRITES_FRAME 80 |
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19 #define MAX_SPRITES_FRAME_H32 64 |
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20 |
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21 #define FBUF_SHADOW 0x0001 |
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22 #define FBUF_HILIGHT 0x0010 |
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23 #define FBUF_BIT_PRIORITY 0x1000 |
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24 #define FBUF_SRC_MASK 0xE000 |
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25 #define FBUF_SRC_A 0x0000 |
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26 #define FBUF_SRC_W 0x2000 |
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27 #define FBUF_SRC_B 0x4000 |
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28 #define FBUF_SRC_S 0x6000 |
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29 #define FBUF_SRC_BG 0x8000 |
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30 |
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31 #define MCLKS_LINE 3420 |
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32 |
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33 #define FLAG_DOT_OFLOW 0x01 |
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34 #define FLAG_CAN_MASK 0x02 |
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35 #define FLAG_MASKED 0x04 |
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36 #define FLAG_WINDOW 0x08 |
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37 #define FLAG_PENDING 0x10 |
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38 #define FLAG_UNUSED_SLOT 0x20 |
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39 #define FLAG_DMA_RUN 0x40 |
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40 #define FLAG_DMA_PROG 0x80 |
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41 |
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42 #define FLAG2_VINT_PENDING 0x01 |
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43 #define FLAG2_HINT_PENDING 0x02 |
75 | 44 |
45 #define DISPLAY_ENABLE 0x40 | |
46 | |
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47 enum { |
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48 REG_MODE_1=0, |
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49 REG_MODE_2, |
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50 REG_SCROLL_A, |
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51 REG_WINDOW, |
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52 REG_SCROLL_B, |
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53 REG_SAT, |
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54 REG_BG_COLOR=7, |
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55 REG_HINT=0xA, |
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56 REG_MODE_3, |
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57 REG_MODE_4, |
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58 REG_HSCROLL, |
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59 REG_AUTOINC=0xF, |
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60 REG_SCROLL, |
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61 REG_WINDOW_H, |
75 | 62 REG_WINDOW_V, |
63 REG_DMALEN_L, | |
64 REG_DMALEN_H, | |
65 REG_DMASRC_L, | |
66 REG_DMASRC_M, | |
67 REG_DMASRC_H | |
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68 } vdp_regs; |
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69 |
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70 typedef struct { |
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71 uint16_t address; |
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72 int16_t x_pos; |
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73 uint8_t pal_priority; |
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74 uint8_t h_flip; |
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75 } sprite_draw; |
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76 |
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77 typedef struct { |
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78 uint8_t size; |
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79 uint8_t index; |
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80 int16_t y; |
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81 } sprite_info; |
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82 |
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83 typedef struct { |
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84 uint32_t cycle; |
138 | 85 uint16_t address; |
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86 uint16_t value; |
138 | 87 uint8_t cd; |
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88 uint8_t partial; |
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89 } fifo_entry; |
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90 |
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91 typedef struct { |
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92 fifo_entry *fifo_cur; |
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93 fifo_entry *fifo_end; |
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94 uint16_t address; |
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95 uint8_t cd; |
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96 uint8_t flags; |
138 | 97 uint8_t regs[VDP_REGS]; |
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98 //cycle count in MCLKs |
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99 uint32_t cycles; |
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100 uint8_t *vdpmem; |
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101 //stores 2-bit palette + 4-bit palette index + priority for current sprite line |
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102 uint8_t *linebuf; |
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103 //stores 12-bit color + shadow/highlight bits |
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104 uint16_t *framebuf; |
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105 uint16_t cram[CRAM_SIZE]; |
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106 uint16_t vsram[VSRAM_SIZE]; |
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107 uint8_t latched_mode; |
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108 uint16_t hscroll_a; |
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109 uint16_t hscroll_b; |
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110 uint8_t sprite_index; |
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111 uint8_t sprite_draws; |
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112 int8_t slot_counter; |
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113 int8_t cur_slot; |
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114 sprite_draw sprite_draw_list[MAX_DRAWS]; |
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115 sprite_info sprite_info_list[MAX_SPRITES_LINE]; |
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116 uint16_t col_1; |
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117 uint16_t col_2; |
75 | 118 uint16_t dma_val; |
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119 uint8_t v_offset; |
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120 uint8_t dma_cd; |
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121 uint8_t hint_counter; |
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122 uint8_t flags2; |
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123 uint8_t *tmp_buf_a; |
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124 uint8_t *tmp_buf_b; |
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125 } vdp_context; |
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126 |
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127 void init_vdp_context(vdp_context * context); |
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128 void vdp_run_context(vdp_context * context, uint32_t target_cycles); |
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129 //runs from current cycle count to VBLANK for the current mode, returns ending cycle count |
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130 uint32_t vdp_run_to_vblank(vdp_context * context); |
75 | 131 //runs until the target cycle is reached or the current DMA operation has completed, whicever comes first |
132 void vdp_run_dma_done(vdp_context * context, uint32_t target_cycles); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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133 void vdp_load_savestate(vdp_context * context, FILE * state_file); |
56
a28b1dfe1af2
Fix CRAM and possibly VSRAM writes
Mike Pavone <pavone@retrodev.com>
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54
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134 void vdp_save_state(vdp_context * context, FILE * outfile); |
75 | 135 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>
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138
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136 int vdp_data_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>
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43
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137 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>
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43
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138 uint16_t vdp_data_port_read(vdp_context * context); |
137 | 139 uint16_t vdp_hv_counter_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>
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56
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140 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>
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230
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141 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>
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142 uint32_t vdp_next_vint(vdp_context * context); |
333 | 143 uint32_t vdp_next_vint_z80(vdp_context * context); |
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>
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230
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144 void vdp_int_ack(vdp_context * context, uint16_t int_num); |
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>
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317
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145 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>
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322
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146 void vdp_print_reg_explain(vdp_context * context); |
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f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
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147 |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
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148 #endif //VDP_H_ |