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Paradise WD90C11: Implement a separate rendered specifically for that 2-color mode (really, 16-color mode with mono patterns), fixes #1800.

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OBattler
2025-07-11 10:48:51 +02:00
parent 688b371419
commit b76ff66e01
1 changed files with 88 additions and 0 deletions
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88
src/video/vid_paradise.c
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@@ -32,6 +32,7 @@
#include <86box/video.h>
#include <86box/vid_svga.h>
#include <86box/vid_svga_render.h>
#include <86box/vid_svga_render_remap.h>
typedef struct paradise_t {
svga_t svga;
@@ -391,6 +392,85 @@ paradise_remap(paradise_t *paradise)
}
}
void
paradise_render_4bpp_word_highres(svga_t *svga)
{
int x;
int oddeven;
uint32_t addr;
uint32_t *p;
uint8_t edat[4];
uint8_t dat;
uint32_t changed_addr;
if ((svga->displine + svga->y_add) < 0)
return;
changed_addr = ((svga->memaddr & 0x3fffc) << 1);
if (svga->changedvram[changed_addr >> 12] || svga->changedvram[(changed_addr >> 12) + 1] || svga->fullchange) {
p = &svga->monitor->target_buffer->line[svga->displine + svga->y_add][svga->x_add];
if (svga->firstline_draw == 2000)
svga->firstline_draw = svga->displine;
svga->lastline_draw = svga->displine;
for (x = 0; x <= (svga->hdisp + svga->scrollcache); x += 8) {
addr = ((svga->memaddr & 0x3fffc) << 1);
oddeven = 0;
oddeven = (svga->memaddr & 2) ? 1 : 0;
*(uint32_t *) (&edat[0]) = *(uint32_t *) (&svga->vram[addr | oddeven]) & 0x00ff00ff;
svga->memaddr = (svga->memaddr + 2) & svga->vram_mask;
dat = edatlookup[edat[0] >> 6][edat[1] >> 6] | (edatlookup[edat[2] >> 6][edat[3] >> 6] << 2);
p[0] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
p[1] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
dat = edatlookup[(edat[0] >> 4) & 3][(edat[1] >> 4) & 3] |
(edatlookup[(edat[2] >> 4) & 3][(edat[3] >> 4) & 3] << 2);
p[2] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
p[3] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
dat = edatlookup[(edat[0] >> 2) & 3][(edat[1] >> 2) & 3] |
(edatlookup[(edat[2] >> 2) & 3][(edat[3] >> 2) & 3] << 2);
p[4] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
p[5] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
dat = edatlookup[edat[0] & 3][edat[1] & 3] | (edatlookup[edat[2] & 3][edat[3] & 3] << 2);
p[6] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
p[7] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
p += 8;
}
}
}
static int
paradise_mode_is_word(svga_t *svga)
{
int func_nr;
if (svga->fb_only)
func_nr = 0;
else {
if (svga->force_dword_mode)
func_nr = VAR_DWORD_MODE;
else if (svga->crtc[0x14] & 0x40)
func_nr = svga->packed_chain4 ? VAR_BYTE_MODE : VAR_DWORD_MODE;
else if (svga->crtc[0x17] & 0x40)
func_nr = VAR_BYTE_MODE;
else if (svga->crtc[0x17] & 0x20)
func_nr = VAR_WORD_MODE_MA15;
else
func_nr = VAR_WORD_MODE_MA13;
if (!(svga->crtc[0x17] & 0x01))
func_nr |= VAR_ROW0_MA13;
if (!(svga->crtc[0x17] & 0x02))
func_nr |= VAR_ROW1_MA14;
}
return (func_nr == 2);
}
void
paradise_recalctimings(svga_t *svga)
{
@@ -456,6 +536,14 @@ paradise_recalctimings(svga_t *svga)
a windowed DOS box in Win3.x*/
}
}
/*
Yes, this is basically hack but I'm going to look at a proper rewrite in
86Box 6.0.
*/
if ((paradise->type == WD90C11) && (svga->hdisp == 1024) &&
(svga->render == svga_render_4bpp_highres) && paradise_mode_is_word(svga))
svga->render = paradise_render_4bpp_word_highres;
}
uint32_t