From a305882dba28804ba755b634a8f943c26f2d0106 Mon Sep 17 00:00:00 2001
From: Vicki Pfau <vi@endrift.com>
Date: Mon, 17 Oct 2022 00:59:59 -0700
Subject: [PATCH] GB MBC: Improve Li Cheng heuristic slightly

---
 src/gb/mbc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gb/mbc.c b/src/gb/mbc.c
index f15cba519..441baaa53 100644
--- a/src/gb/mbc.c
+++ b/src/gb/mbc.c
@@ -216,6 +216,9 @@ static enum GBMemoryBankControllerType _detectUnlMBC(const uint8_t* mem, size_t
 		if (cart->type == 0x01) { // Make sure we're not using a "fixed" version
 			return GB_UNL_LI_CHENG;
 		}
+		if ((0x8000 << cart->romSize) != size) {
+			return GB_UNL_LI_CHENG;
+		}
 		break;
 	}