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ATI EGA Wonder 800 Plus changes (June 7th, 2025)

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It really comes down to the EEPROM for the monitor settings and fixes for resolutions between hdisp > 640 && hdisp < 800 (like MDA)
This commit is contained in:
TC1995
2025-06-07 22:50:21 +02:00
parent 05003f5c3e
commit cf042e95cb
1 changed files with 28 additions and 5 deletions
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33
src/video/vid_ega.c
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@@ -667,7 +667,7 @@ ega_recalctimings(ega_t *ega)
}
if (ega->chipset) {
if (ega->hdisp > 640) {
if (ega->hdisp >= 800) {
ega->dispend <<= 1;
ega->vtotal <<= 1;
ega->split <<= 1;
@@ -881,7 +881,7 @@ ega_poll(void *priv)
ega->stat &= ~8;
ega->vslines++;
if (ega->chipset) {
if (ega->hdisp > 640) {
if (ega->hdisp >= 800) {
if (ega->displine > 2000)
ega->displine = 0;
} else {
@@ -932,7 +932,7 @@ ega_poll(void *priv)
!(ega->real_vc & 1))
ega->vc++;
if (ega->chipset) {
if (ega->hdisp > 640)
if (ega->hdisp >= 800)
ega->vc &= 1023;
else
ega->vc &= 511;
@@ -1641,7 +1641,7 @@ ega_standalone_init(const device_t *info)
}
}
monitor_type = device_get_config_int("monitor_type");
monitor_type = ega->chipset ? 0x09 : device_get_config_int("monitor_type");
ega_init(ega, monitor_type, (monitor_type & 0x0F) == 0x0B);
ega->vram_limit = device_get_config_int("memory") * 1024;
@@ -1841,6 +1841,29 @@ static const device_config_t ega_config[] = {
// clang-format on
};
static const device_config_t atiega800p_config[] = {
// clang-format off
{
.name = "memory",
.description = "Memory size",
.type = CONFIG_SELECTION,
.default_string = NULL,
.default_int = 256,
.file_filter = NULL,
.spinner = { 0 },
.selection = {
{ .description = "32 KB", .value = 32 },
{ .description = "64 KB", .value = 64 },
{ .description = "128 KB", .value = 128 },
{ .description = "256 KB", .value = 256 },
{ .description = "" }
},
.bios = { { 0 } }
},
{ .name = "", .description = "", .type = CONFIG_END }
// clang-format on
};
const device_t ega_device = {
.name = "IBM EGA",
.internal_name = "ega",
@@ -1894,7 +1917,7 @@ const device_t atiega800p_device = {
.available = atiega800p_standalone_available,
.speed_changed = ega_speed_changed,
.force_redraw = NULL,
.config = ega_config
.config = atiega800p_config
};
const device_t iskra_ega_device = {