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Cirrus: Make CL-GD5402 VRAM configurable with options for 256KB and 512KB

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This commit is contained in:
win2kgamer
2026-02-16 20:37:59 -06:00
parent 5b4b486afc
commit dfee5d88d3
1 changed files with 26 additions and 6 deletions
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32
src/video/vid_cl54xx.c
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@@ -1330,7 +1330,10 @@ gd54xx_in(uint16_t addr, void *priv)
/* Scratch Pad 1 (Memory size for 5402/542x) */
ret = svga->seqregs[0x0a] & ~0x1a;
if (svga->crtc[0x27] == CIRRUS_ID_CLGD5402) {
ret |= 0x01; /*512K of memory*/
if ((gd54xx->vram_size >> 10) == 512)
ret |= 0x01; /*512K of memory*/
else
ret &= 0xfe; /*256K of memory*/
} else if (svga->crtc[0x27] > CIRRUS_ID_CLGD5402) {
switch (gd54xx->vram_size >> 10) {
case 512:
@@ -4443,8 +4446,6 @@ gd54xx_init(const device_t *info)
vram = 1024;
else if (id == CIRRUS_ID_CLGD5401)
vram = 256;
else if (id == CIRRUS_ID_CLGD5402)
vram = 512;
else
vram = device_get_config_int("memory");
@@ -4780,6 +4781,25 @@ gd54xx_force_redraw(void *priv)
}
// clang-format off
static const device_config_t gd5402_config[] = {
{
.name = "memory",
.description = "Memory size",
.type = CONFIG_SELECTION,
.default_string = NULL,
.default_int = 512,
.file_filter = NULL,
.spinner = { 0 },
.selection = {
{ .description = "256 KB", .value = 256 },
{ .description = "512 KB", .value = 512 },
{ .description = "" }
},
.bios = { { 0 } }
},
{ .name = "", .description = "", .type = CONFIG_END }
};
static const device_config_t gd542x_config[] = {
{
.name = "memory",
@@ -5027,7 +5047,7 @@ const device_t gd5402_isa_device = {
.available = gd5402_available,
.speed_changed = gd54xx_speed_changed,
.force_redraw = gd54xx_force_redraw,
.config = NULL,
.config = gd5402_config,
};
const device_t gd5402_onboard_device = {
@@ -5041,7 +5061,7 @@ const device_t gd5402_onboard_device = {
.available = NULL,
.speed_changed = gd54xx_speed_changed,
.force_redraw = gd54xx_force_redraw,
.config = NULL,
.config = gd5402_config,
};
const device_t gd5402_onboard_commodore_device = {
@@ -5055,7 +5075,7 @@ const device_t gd5402_onboard_commodore_device = {
.available = NULL,
.speed_changed = gd54xx_speed_changed,
.force_redraw = gd54xx_force_redraw,
.config = NULL,
.config = gd5402_config,
};
const device_t gd5420_isa_device = {