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Added monitor type selection on the standalone HT-216 with BIOS auto-patching.

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This commit is contained in:
OBattler
2021-03-27 04:39:45 +01:00
parent fd7e77b63d
commit 0e206a977e
1 changed files with 57 additions and 2 deletions
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59
src/video/vid_ht216.c
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@@ -43,7 +43,7 @@ typedef struct ht216_t
rom_t bios_rom;
uint32_t vram_mask;
uint8_t adjust_cursor;
uint8_t adjust_cursor, monitor_type;
int ext_reg_enable;
int clk_sel;
@@ -1372,7 +1372,34 @@ void
rom_init(&ht216->bios_rom, BIOS_VIDEO7_VGA_1024I_PATH, 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
break;
case 3:
ht216->monitor_type = device_get_config_int("monitor_type");
rom_init(&ht216->bios_rom, BIOS_HT216_32_PATH, 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
/* Patch the BIOS for monitor type. */
if (ht216->monitor_type & 0x10) {
/* Color */
ht216->bios_rom.rom[0x0526] = 0x0c;
ht216->bios_rom.rom[0x0528] = 0xeb;
ht216->bios_rom.rom[0x7fff] += 0x26;
} else {
/* Mono */
ht216->bios_rom.rom[0x0526] = 0x24;
ht216->bios_rom.rom[0x0527] = 0xef;
ht216->bios_rom.rom[0x0528] = ht216->bios_rom.rom[0x0529] = 0x90;
ht216->bios_rom.rom[0x7fff] += 0xfe;
}
/* Patch bios for interlaced/non-interlaced. */
if (ht216->monitor_type & 0x08) {
/* Non-Interlaced */
ht216->bios_rom.rom[0x170b] = 0x0c;
ht216->bios_rom.rom[0x170d] = ht216->bios_rom.rom[0x170e] = 0x90;
ht216->bios_rom.rom[0x7fff] += 0xf4;
} else {
/* Interlaced */
ht216->bios_rom.rom[0x170b] = 0x24;
ht216->bios_rom.rom[0x170c] = 0xf7;
ht216->bios_rom.rom[0x170d] = 0xeb;
ht216->bios_rom.rom[0x7fff] += 0x1e;
}
break;
}
@@ -1526,6 +1553,33 @@ static const device_config_t v7_vga_1024i_config[] =
}
};
static const device_config_t ht216_32_standalone_config[] =
{
{
"monitor_type", "Monitor type", CONFIG_SELECTION, "", 0x18, "", { 0 },
{
{
"Mono Interlaced", 0x00
},
{
"Mono Non-Interlaced", 0x08
},
{
"Color Interlaced", 0x10
},
{
"Color Non-Interlaced", 0x18
},
{
""
}
}
},
{
"", "", -1
}
};
const device_t g2_gc205_device =
{
"G2 GC205",
@@ -1576,5 +1630,6 @@ const device_t ht216_32_standalone_device =
NULL,
{ ht216_standalone_available },
ht216_speed_changed,
ht216_force_redraw
ht216_force_redraw,
ht216_32_standalone_config
};