Mercurial > repos > blastem
diff vdp.h @ 1318:bfdd450e7dea
Initial work on handling the 128KB VRAM mode bit and some basic prep work for VDP test register support
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Sun, 16 Apr 2017 16:40:04 -0700 |
| parents | 3772bb926be5 |
| children | b1423d432c0e |
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--- a/vdp.h Sun Apr 16 16:38:56 2017 -0700 +++ b/vdp.h Sun Apr 16 16:40:04 2017 -0700 @@ -101,6 +101,7 @@ #define BIT_DISP_DIS 0x01 //Mode reg 2 +#define BIT_128K_VRAM 0x80 #define BIT_DISP_EN 0x40 #define BIT_VINT_EN 0x20 #define BIT_DMA_ENABLE 0x10 @@ -135,7 +136,7 @@ typedef struct { uint32_t cycle; - uint16_t address; + uint32_t address; uint16_t value; uint8_t cd; uint8_t partial; @@ -145,7 +146,7 @@ fifo_entry fifo[FIFO_SIZE]; int32_t fifo_write; int32_t fifo_read; - uint16_t address; + uint32_t address; uint8_t cd; uint8_t flags; uint8_t regs[VDP_REGS]; @@ -187,6 +188,7 @@ uint16_t col_2; uint16_t hv_latch; uint16_t prefetch; + uint16_t test_port; uint8_t fetch_tmp[2]; uint8_t v_offset; uint8_t dma_cd; @@ -233,6 +235,6 @@ void latch_mode(vdp_context * context); uint32_t vdp_cycles_to_frame_end(vdp_context * context); void write_cram(vdp_context * context, uint16_t address, uint16_t value); -void write_vram_byte(vdp_context *context, uint16_t address, uint8_t value); +void write_vram_byte(vdp_context *context, uint32_t address, uint8_t value); #endif //VDP_H_