Mercurial > repos > blastem
changeset 705:ce4046476abc
Add description of cd register value to vr debugger command
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Wed, 13 May 2015 19:19:43 -0700 |
| parents | 1a14f5f6c6a1 |
| children | 0a6dea8c8083 |
| files | vdp.c |
| diffstat | 1 files changed, 41 insertions(+), 20 deletions(-) [+] |
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--- a/vdp.c Wed May 13 19:13:49 2015 -0700 +++ b/vdp.c Wed May 13 19:19:43 2015 -0700 @@ -209,6 +209,45 @@ } while (current_index != 0 && count < 80); } +#define VRAM_READ 0 //0000 +#define VRAM_WRITE 1 //0001 +//2 would trigger register write 0010 +#define CRAM_WRITE 3 //0011 +#define VSRAM_READ 4 //0100 +#define VSRAM_WRITE 5//0101 +//6 would trigger regsiter write 0110 +//7 is a mystery +#define CRAM_READ 8 //1000 +//9 is also a mystery //1001 +//A would trigger register write 1010 +//B is a mystery 1011 +#define VRAM_READ8 0xC //1100 +//D is a mystery 1101 +//E would trigger register write 1110 +//F is a mystery 1111 +#define DMA_START 0x20 + +const char * cd_name(uint8_t cd) +{ + switch (cd & 0xF) + { + case VRAM_READ: + return "VRAM read"; + case VRAM_WRITE: + return "VRAM write"; + case CRAM_WRITE: + return "CRAM write"; + case VSRAM_READ: + return "VSRAM read"; + case VSRAM_WRITE: + return "VSRAM write"; + case VRAM_READ8: + return "VRAM read (undocumented 8-bit mode)"; + default: + return "invalid"; + } +} + void vdp_print_reg_explain(vdp_context * context) { char * hscroll[] = {"full", "7-line", "cell", "line"}; @@ -261,11 +300,11 @@ src_types[context->regs[REG_DMASRC_H] >> 6 & 3]); printf("\n**Internal Group**\n" "Address: %X\n" - "CD: %X\n" + "CD: %X - %s\n" "Pending: %s\n" "VCounter: %d\n" "HCounter: %d\n", - context->address, context->cd, (context->flags & FLAG_PENDING) ? "true" : "false", + context->address, context->cd, cd_name(context->cd), (context->flags & FLAG_PENDING) ? "true" : "false", context->vcounter, context->hslot*2); //TODO: Window Group, DMA Group @@ -416,24 +455,6 @@ context->colors[addr + CRAM_SIZE*2] = color_map[(value & 0xEEE) | FBUF_HILIGHT]; } -#define VRAM_READ 0 //0000 -#define VRAM_WRITE 1 //0001 -//2 would trigger register write 0010 -#define CRAM_WRITE 3 //0011 -#define VSRAM_READ 4 //0100 -#define VSRAM_WRITE 5//0101 -//6 would trigger regsiter write 0110 -//7 is a mystery -#define CRAM_READ 8 //1000 -//9 is also a mystery //1001 -//A would trigger register write 1010 -//B is a mystery 1011 -#define VRAM_READ8 0xC //1100 -//D is a mystery 1101 -//E would trigger register write 1110 -//F is a mystery 1111 -#define DMA_START 0x20 - void external_slot(vdp_context * context) { fifo_entry * start = context->fifo + context->fifo_read;