80486DX2-66/86Box-fork
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Fixed high resolution 16 color modes in the Oak OTI-067/077 cards and added additional unimplemented bits of said cards.

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This commit is contained in:
TC1995
2021-04-26 00:19:01 +02:00
parent 5cfccaff1b
commit a01905cce7
1 changed files with 12 additions and 6 deletions
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18
src/video/vid_oak_oti.c
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@@ -29,6 +29,7 @@
#include <86box/video.h>
#include <86box/vid_svga.h>
#define BIOS_037C_PATH "roms/video/oti/bios.bin"
#define BIOS_067_AMA932J_PATH "roms/machines/ama932j/oti067.bin"
#define BIOS_067_M300_08_PATH "roms/machines/olivetti_m300_08/EVC_BIOS.ROM"
@@ -128,7 +129,7 @@ oti_out(uint16_t addr, uint8_t val, void *p)
switch (idx) {
case 0xD:
if (oti->chip_id == OTI_067) {
svga->vram_display_mask = (val & 0xc) ? oti->vram_mask : 0x3ffff;
svga->vram_display_mask = (val & 0x0c) ? oti->vram_mask : 0x3ffff;
if (!(val & 0x80))
svga->vram_display_mask = 0x3ffff;
@@ -137,24 +138,24 @@ oti_out(uint16_t addr, uint8_t val, void *p)
else
mem_mapping_enable(&svga->mapping);
} else if (oti->chip_id == OTI_077) {
svga->vram_display_mask = (val & 0xc) ? oti->vram_mask : 0x3ffff;
svga->vram_display_mask = (val & 0x1c) ? oti->vram_mask : 0x3ffff;
switch ((val & 0xc0) >> 6) {
case 0x00: /* 256 kB of memory */
default:
enable = (oti->vram_size >= 256);
if (val & 0xc)
if (val & 0x0c)
svga->vram_display_mask = MIN(oti->vram_mask, 0x3ffff);
break;
case 0x01: /* 1 MB of memory */
case 0x03:
enable = (oti->vram_size >= 1024);
if (val & 0xc)
if (val & 0x0c)
svga->vram_display_mask = MIN(oti->vram_mask, 0xfffff);
break;
case 0x02: /* 512 kB of memory */
enable = (oti->vram_size >= 512);
if (val & 0xc)
if (val & 0x0c)
svga->vram_display_mask = MIN(oti->vram_mask, 0x7ffff);
break;
}
@@ -329,8 +330,13 @@ oti_recalctimings(svga_t *svga)
oti_t *oti = (oti_t *)svga->p;
if (oti->regs[0x14] & 0x08) svga->ma_latch |= 0x10000;
if (oti->regs[0x16] & 0x08) svga->ma_latch |= 0x20000;
if (oti->regs[0x0d] & 0x0c) svga->rowoffset <<= 1;
if (oti->regs[0x14] & 0x01) svga->vtotal += 0x400;
if (oti->regs[0x14] & 0x02) svga->dispend += 0x400;
if (oti->regs[0x14] & 0x04) svga->vsyncstart += 0x400;
if ((oti->regs[0x0d] & 0x0c) && !(oti->regs[0x0d] & 0x10)) svga->rowoffset <<= 1;
svga->interlace = oti->regs[0x14] & 0x80;
}