Mapper 227: Correct the behavior of submapper 2. Remove submapper 3, as it's actually just mapper 280 without the reset-based UNROM game spot populated.

2025-10-25 13:49:24 +02:00
parent f452da1c89
commit 0a4c82155b
1 changed files with 2 additions and 2 deletions
--- a/src/boards/addrlatch.c
+++ b/src/boards/addrlatch.c
@@ -395,10 +395,10 @@ static void M227Sync(void) {
 		} else {
 			if (L) {
 				setprg16(0x8000, p);
-				setprg16(0xC000, submapper ==3? 0: (p | 7));
+				setprg16(0xC000, p | 7);
 			} else {
 				setprg16(0x8000, p);
-				setprg16(0xC000, submapper ==2? 0: (p & 0x38));
+				setprg16(0xC000, submapper ==2? (p & 0x20): (p & 0x38));
 			}
 		}
 	}