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The delayed video changes of the night (January 20th, 2025)

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Generic SVGA layer:
Added function pointers of the banked mapping for use with add-on cards with their own mapping when the VGA card banked mapping is not active or viceversa (e.g.: XGA).

XGA-1/2:
1. Reimplemented Area Fill and Boundary Mode as best as possible.
2. Fixed conflicts with banked mapping with VGA clones.
3. Fixed inverted colors (again) on accelerated 16bpp mode under OS/2.

Video7 with ATI 8514/A add-on.
Added a workaround (BIOS issue? I don't know) that disables 8514/A mode and reenables VGA mode when needed. Fixes screen freezes and polling issues with various drivers for Windows and others.
This commit is contained in:
TC1995
2025-01-20 03:26:49 +01:00
parent 84853cb21f
commit f48c50f4ba
6 changed files with 219 additions and 143 deletions
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27
src/video/vid_ht216.c
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@@ -33,9 +33,12 @@
#include <86box/rom.h>
#include <86box/device.h>
#include <86box/video.h>
#include <86box/vid_8514a.h>
#include <86box/vid_xga.h>
#include <86box/vid_svga.h>
#include <86box/vid_svga_render.h>
#include <86box/vid_ati_eeprom.h>
#include <86box/vid_ati_mach8.h>
#include <86box/plat_fallthrough.h>
#include <86box/plat_unused.h>
@@ -425,9 +428,8 @@ ht216_out(uint16_t addr, uint8_t val, void *priv)
svga->banked_mask = 0xffff;
}
if (svga->gdcaddr <= 8) {
if (svga->gdcaddr <= 8)
svga->fast = (svga->gdcreg[8] == 0xff && !(svga->gdcreg[3] & 0x18) && !svga->gdcreg[1]) && svga->chain4 && svga->packed_chain4;
}
break;
case 0x3D4:
@@ -625,7 +627,9 @@ ht216_remap(ht216_t *ht216)
void
ht216_recalctimings(svga_t *svga)
{
ht216_t *ht216 = (ht216_t *) svga->priv;
ht216_t *ht216 = (ht216_t *) svga->priv;
ibm8514_t *dev = (ibm8514_t *) svga->dev8514;
mach_t *mach = (mach_t *) svga->ext8514;
int high_res_256 = 0;
@@ -672,10 +676,16 @@ ht216_recalctimings(svga_t *svga)
if (!svga->scrblank && svga->attr_palette_enable) {
if (!(svga->gdcreg[6] & 1) && !(svga->attrregs[0x10] & 1)) { /*Text mode*/
if (svga->seqregs[1] & 8) /*40 column*/ {
if (svga->seqregs[1] & 8) /*40 column*/
svga->render = svga_render_text_40;
} else {
else
svga->render = svga_render_text_80;
if (ibm8514_active && (svga->dev8514 != NULL)) {
if (svga->ext8514 != NULL) {
if (!(dev->accel.advfunc_cntl & 0x01) && !(mach->accel.clock_sel & 0x01)) /*FIXME: Possibly a BIOS bug within the V7 chips when it's used with a 8514/A card?*/
dev->on &= ~0x01;
}
}
} else {
if (svga->crtc[0x17] == 0xeb) {
@@ -1576,10 +1586,17 @@ ht216_init(const device_t *info, uint32_t mem_size, int has_rom)
if (has_rom == 4)
svga->ramdac = device_add(&sc11484_nors2_ramdac_device);
svga->read = ht216_read;
svga->readw = NULL;
svga->readl = NULL;
svga->write = ht216_write;
svga->writew = ht216_writew;
if ((info->flags & DEVICE_VLB) || (info->flags & DEVICE_MCA)) {
svga->writel = ht216_writel;
mem_mapping_set_handler(&svga->mapping, ht216_read, NULL, NULL, ht216_write, ht216_writew, ht216_writel);
mem_mapping_add(&ht216->linear_mapping, 0, 0, ht216_read_linear, NULL, NULL, ht216_write_linear, ht216_writew_linear, ht216_writel_linear, NULL, MEM_MAPPING_EXTERNAL, svga);
} else {
svga->writel = NULL;
mem_mapping_set_handler(&svga->mapping, ht216_read, NULL, NULL, ht216_write, ht216_writew, NULL);
mem_mapping_add(&ht216->linear_mapping, 0, 0, ht216_read_linear, NULL, NULL, ht216_write_linear, ht216_writew_linear, NULL, NULL, MEM_MAPPING_EXTERNAL, svga);
}