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Implement 256kb wrap on CL-GD5429.

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This commit is contained in:
SarahW 2018-02-17 11:08:46 +00:00
commit 1a430b574f
1 changed files with 5 additions and 0 deletions
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5
src/vid_cl5429.c
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@ -21,6 +21,8 @@ typedef struct gd5429_t
uint32_t bank[2]; uint32_t bank[2];
uint32_t mask; uint32_t mask;
uint32_t vram_mask;
struct struct
{ {
@ -415,6 +417,8 @@ void gd5429_recalctimings(svga_t *svga)
break; break;
} }
svga->clock = cpuclock / vclk; svga->clock = cpuclock / vclk;
svga->vram_display_mask = (svga->crtc[0x1b] & 2) ? gd5429->vram_mask : 0x3ffff;
} }
void gd5429_hwcursor_draw(svga_t *svga, int displine) void gd5429_hwcursor_draw(svga_t *svga, int displine)
@ -1131,6 +1135,7 @@ void *gd5429_init()
memset(gd5429, 0, sizeof(gd5429_t)); memset(gd5429, 0, sizeof(gd5429_t));
vram_size = device_get_config_int("memory"); vram_size = device_get_config_int("memory");
gd5429->vram_mask = (vram_size << 20) - 1;
rom_init(&gd5429->bios_rom, "5429.vbi", 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL); rom_init(&gd5429->bios_rom, "5429.vbi", 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);