Mercurial > repos > blastem
diff vdp.c @ 415:8c60c8c09a0f
Fix sprite y mask in interlace mode. Fix framebuffer selection when switching out of interlace mode.
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Sun, 23 Jun 2013 10:17:40 -0700 |
| parents | 51ee0f117365 |
| children | acdd6c5240fe |
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--- a/vdp.c Sun Jun 23 09:17:19 2013 -0700 +++ b/vdp.c Sun Jun 23 10:17:40 2013 -0700 @@ -168,7 +168,7 @@ uint16_t sat_address = (context->regs[REG_SAT] & 0x7F) << 9; uint16_t address = context->sprite_index * 8 + sat_address; line += ymin; - uint16_t y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) & 0x1FF; + uint16_t y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) & ymask; uint8_t height = ((context->vdpmem[address+2] & 0x3) + 1) * height_mult; //printf("Sprite %d | y: %d, height: %d\n", context->sprite_index, y, height); if (y <= line && line < (y + height)) { @@ -181,7 +181,7 @@ if (context->sprite_index && context->slot_counter) { address = context->sprite_index * 8 + sat_address; - y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) & 0x1FF; + y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) & ymask; height = ((context->vdpmem[address+2] & 0x3) + 1) * height_mult; //printf("Sprite %d | y: %d, height: %d\n", context->sprite_index, y, height); if (y <= line && line < (y + height)) { @@ -1350,6 +1350,9 @@ } if (reg == REG_MODE_4) { context->double_res = (value & (BIT_INTERLACE | BIT_DOUBLE_RES)) == (BIT_INTERLACE | BIT_DOUBLE_RES); + if (!context->double_res) { + context->framebuf = context->oddbuf; + } } } } else {