all repos — mgba @ 2693f9d09b92c1c85788ce53fb27e2fee16c33f9

mGBA Game Boy Advance Emulator

Implement high VRAM mirroring for writes
Jeffrey Pfau jeffrey@endrift.com
Tue, 01 Jul 2014 00:26:57 -0700
commit

2693f9d09b92c1c85788ce53fb27e2fee16c33f9

parent

a7eced1324432de36c24f2b62ae87bb3ac0892c5

1 files changed, 5 insertions(+), 1 deletions(-)

jump to
M src/gba/gba-memory.c → src/gba/gba-memory.c 
@@ -378,8 +378,10 @@ gba->video.renderer->writePalette(gba->video.renderer, (address & (SIZE_PALETTE_RAM - 1)) + 2, value >> 16);
 		gba->video.renderer->writePalette(gba->video.renderer, address & (SIZE_PALETTE_RAM - 1), value);
 		break;
 	case BASE_VRAM:
-		if ((address & OFFSET_MASK) < SIZE_VRAM - 2) {
+		if ((address & OFFSET_MASK) < SIZE_VRAM) {
 			STORE_32(value, address & 0x0001FFFF, gba->video.renderer->vram);
+		} else if ((address & OFFSET_MASK) < 0x00020000) {
+			STORE_32(value, address & 0x00017FFF, gba->video.renderer->vram);
 		}
 		break;
 	case BASE_OAM:

@@ -427,6 +429,8 @@ break;
 	case BASE_VRAM:
 		if ((address & OFFSET_MASK) < SIZE_VRAM) {
 			STORE_16(value, address & 0x0001FFFF, gba->video.renderer->vram);
+		} else if ((address & OFFSET_MASK) < 0x00020000) {
+			STORE_16(value, address & 0x00017FFF, gba->video.renderer->vram);
 		}
 		break;
 	case BASE_OAM: