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comparison vdp.h @ 54:3b79cbcf6846

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Get Flavio's color bar demo kind of sort of working
author Mike Pavone <pavone@retrodev.com>
date Tue, 18 Dec 2012 02:16:42 -0800
parents 3fc57e1a2c56
children a28b1dfe1af2
comparison
equal deleted inserted replaced
53:44e661913a51 54:3b79cbcf6846
23 #define FBUF_SRC_A 0x0000 23 #define FBUF_SRC_A 0x0000
24 #define FBUF_SRC_W 0x2000 24 #define FBUF_SRC_W 0x2000
25 #define FBUF_SRC_B 0x4000 25 #define FBUF_SRC_B 0x4000
26 #define FBUF_SRC_S 0x6000 26 #define FBUF_SRC_S 0x6000
27 #define FBUF_SRC_BG 0x8000 27 #define FBUF_SRC_BG 0x8000
28
29 #define MCLKS_LINE 3420
28 30
29 enum { 31 enum {
30 REG_MODE_1=0, 32 REG_MODE_1=0,
31 REG_MODE_2, 33 REG_MODE_2,
32 REG_SCROLL_A, 34 REG_SCROLL_A,
56 uint8_t index; 58 uint8_t index;
57 int16_t y; 59 int16_t y;
58 } sprite_info; 60 } sprite_info;
59 61
60 typedef struct { 62 typedef struct {
63 uint32_t cycle;
64 uint16_t value;
65 uint8_t partial;
66 } fifo_entry;
67
68 typedef struct {
69 fifo_entry *fifo_cur;
70 fifo_entry *fifo_end;
71 uint16_t address;
72 uint8_t cd;
73 uint8_t flags;
61 //cycle count in MCLKs 74 //cycle count in MCLKs
62 uint32_t cycles; 75 uint32_t cycles;
63 uint8_t *vdpmem; 76 uint8_t *vdpmem;
64 //stores 2-bit palette + 4-bit palette index + priority for current sprite line 77 //stores 2-bit palette + 4-bit palette index + priority for current sprite line
65 uint8_t *linebuf; 78 uint8_t *linebuf;
78 sprite_draw sprite_draw_list[MAX_DRAWS]; 91 sprite_draw sprite_draw_list[MAX_DRAWS];
79 sprite_info sprite_info_list[MAX_SPRITES_LINE]; 92 sprite_info sprite_info_list[MAX_SPRITES_LINE];
80 uint16_t col_1; 93 uint16_t col_1;
81 uint16_t col_2; 94 uint16_t col_2;
82 uint8_t v_offset; 95 uint8_t v_offset;
83 uint8_t flags;
84 uint8_t *tmp_buf_a; 96 uint8_t *tmp_buf_a;
85 uint8_t *tmp_buf_b; 97 uint8_t *tmp_buf_b;
86 } vdp_context; 98 } vdp_context;
87 99
88 void init_vdp_context(vdp_context * context); 100 void init_vdp_context(vdp_context * context);
89 void vdp_run_context(vdp_context * context, uint32_t target_cycles); 101 void vdp_run_context(vdp_context * context, uint32_t target_cycles);
90 //runs from current cycle count to VBLANK for the current mode, returns ending cycle count 102 //runs from current cycle count to VBLANK for the current mode, returns ending cycle count
91 uint32_t vdp_run_to_vblank(vdp_context * context); 103 uint32_t vdp_run_to_vblank(vdp_context * context);
92 void vdp_load_savestate(vdp_context * context, FILE * state_file); 104 void vdp_load_savestate(vdp_context * context, FILE * state_file);
105 void vdp_control_port_write(vdp_context * context, uint16_t value);
106 void vdp_data_port_write(vdp_context * context, uint16_t value);
107 uint16_t vdp_control_port_read(vdp_context * context);
108 uint16_t vdp_data_port_read(vdp_context * context);
93 109
94 #endif //VDP_H_ 110 #endif //VDP_H_