Mercurial > repos > blastem
diff vdp.c @ 23:3e924bb56560
Fix endianness of VSRAM when read from Genecyst save state
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Sat, 08 Dec 2012 16:02:17 -0800 |
| parents | f090a98ccb7e |
| children | 30ae73f96267 |
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--- a/vdp.c Sat Dec 08 11:59:50 2012 -0800 +++ b/vdp.c Sat Dec 08 16:02:17 2012 -0800 @@ -151,6 +151,7 @@ } vscroll &= (context->vsram[context->regs[REG_MODE_3] & 0x4 ? column : 0] + line); context->v_offset = vscroll & 0x7; + printf("BG | line %d, vsram: %d, vscroll: %d, v_offset: %d\n", line, context->vsram[context->regs[REG_MODE_3] & 0x4 ? column : 0], vscroll, context->v_offset); vscroll /= 8; uint16_t hscroll_mask; uint16_t v_mul; @@ -176,7 +177,7 @@ } uint16_t hscroll = (hscroll_val + (column-2) * 8) & hscroll_mask; uint16_t offset = address + ((vscroll * v_mul + hscroll/4) & 0x1FFF); - //printf("A | line: %d, col: %d, x: %d, hs_mask %X, v_mul: %d, scr reg: %X, tbl addr: %X\n", line, column, hscroll, hscroll_mask, v_mul, context->regs[REG_SCROLL], offset); + printf("BG | line: %d, col: %d, x: %d, hs_mask %X, v_mul: %d, scr reg: %X, tbl addr: %X\n", line, column, hscroll, hscroll_mask, v_mul, context->regs[REG_SCROLL], offset); context->col_1 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; hscroll = (hscroll_val + (column-1) * 8) & hscroll_mask; offset = address + ((vscroll * v_mul + hscroll/4) & 0x1FFF); @@ -900,7 +901,7 @@ } fread(tmp_buf, 2, VSRAM_SIZE, state_file); for (int i = 0; i < VSRAM_SIZE; i++) { - context->vsram[i] = (tmp_buf[i*2] << 8) | tmp_buf[i*2+1]; + context->vsram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; } fseek(state_file, GST_VDP_MEM, SEEK_SET); fread(context->vdpmem, 1, VRAM_SIZE, state_file);