Merge pull request #3841 from 86Box/tc1995

8-bit renderer fix about the Tseng cards:
This commit is contained in:
Miran Grča
2023-11-21 20:29:17 +01:00
committed by GitHub

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@@ -470,9 +470,9 @@ svga_render_indexed_gfx(svga_t *svga, bool highres, bool combine8bits)
const bool dwordincr = ((svga->crtc[0x14] & 0x20) != 0) && !wordincr;
const bool dwordshift = ((svga->crtc[0x14] & 0x40) != 0);
const bool wordshift = ((svga->crtc[0x17] & 0x40) == 0) && !dwordshift;
const uint32_t incbypow2 = combine8bits && svga->force_old_addr ? 0 : (dwordshift ? 2 : wordshift ? 1 : 0);
const uint32_t incevery = combine8bits && svga->force_old_addr ? 1 : (dwordincr ? 4 : wordincr ? 2 : 1);
const uint32_t loadevery = combine8bits && svga->force_old_addr ? 1 : (dwordload ? 4 : wordload ? 2 : 1);
const uint32_t incbypow2 = (combine8bits && (svga->force_old_addr || svga->packed_chain4)) ? 0 : (dwordshift ? 2 : wordshift ? 1 : 0);
const uint32_t incevery = (combine8bits && (svga->force_old_addr || svga->packed_chain4)) ? 1 : (dwordincr ? 4 : wordincr ? 2 : 1);
const uint32_t loadevery = (combine8bits && (svga->force_old_addr || svga->packed_chain4)) ? 1 : (dwordload ? 4 : wordload ? 2 : 1);
const bool shift2bit = ((svga->gdcreg[0x05] & 0x60) == 0x20 );
const bool shift4bit = ((svga->gdcreg[0x05] & 0x40) == 0x40 );