Mercurial > repos > blastem
diff vdp.c @ 2513:61645edbe30f
Fix TMS9918A sprite zooming and early clock flag
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Fri, 30 Aug 2024 21:16:46 -0700 |
| parents | e51b1fc0e37f |
| children | 75dd7536c467 |
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--- a/vdp.c Thu Aug 29 22:14:33 2024 -0700 +++ b/vdp.c Fri Aug 30 21:16:46 2024 -0700 @@ -3836,6 +3836,9 @@ address = context->vdpmem[mode4_address_map[address] ^ 1] << 3; address |= context->regs[REG_STILE_BASE] << 11 & 0x3800; uint8_t diff = context->vcounter + 1 - context->sprite_info_list[context->sprite_index].y; + if (context->regs[REG_MODE_2] & BIT_SPRITE_ZM) { + diff >>= 1; + } address += diff; context->sprite_draw_list[context->sprite_index].address = address; } @@ -3897,7 +3900,9 @@ output = context->sprite_draw_list[i].pal_priority; } } - context->sprite_draw_list[i].address <<= 1; + if (!(context->regs[REG_MODE_2] & BIT_SPRITE_SZ) || ((x - context->sprite_draw_list[i].x_pos) & 1)) { + context->sprite_draw_list[i].address <<= 1; + } } } return output; @@ -4055,7 +4060,12 @@ #define TMS_SPRITE_SCAN_SLOT(slot) \ case slot:\ - if (context->hslot >= (520 - BORDER_LEFT) / 2) { tms_border(context); }\ + if (context->hslot >= (520 - BORDER_LEFT) / 2) {\ + tms_border(context);\ + } else {\ + tms_sprite_clock(context, 0);\ + tms_sprite_clock(context, 1);\ + }\ tms_sprite_scan(context);\ TMS_CHECK_LIMIT