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Fix sign position of DDA accumulator registers (#6241)

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Cacodemon345
2025-09-27 23:57:12 +06:00
committed by GitHub
parent 74aa15644d
commit bc41f8bbb6
1 changed files with 6 additions and 6 deletions
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12
src/video/vid_s3_virge.c
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@@ -1952,9 +1952,9 @@ s3_virge_mmio_write_l(uint32_t addr, uint32_t val, void *priv)
break;
case 0x8190:
virge->streams.sec_ctrl = val;
virge->streams.dda_horiz_accumulator = val & 0xfff;
if (val & 0x1000)
virge->streams.dda_horiz_accumulator |= ~0xfff;
virge->streams.dda_horiz_accumulator = val & 0x7ff;
if (val & 0x800)
virge->streams.dda_horiz_accumulator |= ~0x7ff;
virge->streams.sdif = (val >> 24) & 7;
break;
@@ -2030,9 +2030,9 @@ s3_virge_mmio_write_l(uint32_t addr, uint32_t val, void *priv)
virge->streams.k2_vert_scale |= ~0x7ff;
break;
case 0x81e8:
virge->streams.dda_vert_accumulator = val & 0xfff;
if (val & 0x1000)
virge->streams.dda_vert_accumulator |= ~0xfff;
virge->streams.dda_vert_accumulator = val & 0x7ff;
if (val & 0x800)
virge->streams.dda_vert_accumulator |= ~0x7ff;
svga_recalctimings(svga);
svga->fullchange = changeframecount;