shithub: riscv

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games/gb: fix mbc5 register addressing (fixes warioland3 gamebreaking bug)

--- a/sys/src/games/gb/mem.c

+++ b/sys/src/games/gb/mem.c

@@ -431,11 +431,11 @@

 		default:

 			nope(a);

 		}

-	switch(a >> 13){

-	case 0: ramen = (v & 0xf) == 0xa; break;

-	case 1: b0 = b0 & 0x100 | v; break;

-	case 2: b0 = b0 & 0xff | v << 8 & 0x100; break;

-	case 3: b1 = v & 0xff; b1 %= nbackbank; break;

+	switch(a >> 12){

+	case 0: case 1: ramen = (v & 0xf) == 0xa; break;

+	case 2: b0 = b0 & 0x100 | v; break;

+	case 3: b0 = b0 & 0xff | v << 8 & 0x100; break;

+	case 4: b1 = v & 0xff; b1 %= nbackbank; break;

 	}

 	b0 %= nrom >> 14;

 	romb = rom + (b0 << 14);