From 689cb2aae98fa5ae7e31cc9b98c07b6c25f89061 Mon Sep 17 00:00:00 2001
From: HeeminTV <heeminwelcome1@gmail.com>
Date: Sat, 20 Jun 2026 00:52:50 +0900
Subject: [PATCH] NES: Fix mapper 121, 187's CHR A18 behavior

---
 Core/NES/Mappers/Mmc3Variants/MMC3_121.h | 2 +-
 Core/NES/Mappers/Mmc3Variants/MMC3_187.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Core/NES/Mappers/Mmc3Variants/MMC3_121.h b/Core/NES/Mappers/Mmc3Variants/MMC3_121.h
index 420d6a268..df8ec7bee 100644
--- a/Core/NES/Mappers/Mmc3Variants/MMC3_121.h
+++ b/Core/NES/Mappers/Mmc3Variants/MMC3_121.h
@@ -49,7 +49,7 @@ class MMC3_121 : public MMC3
 			//Hack for Super 3-in-1
 			BaseMapper::SelectChrPage(slot, page | ((_exRegs[3] & 0x80) << 1), memoryType);
 		} else {
-			if((slot < 4 && _chrMode == 0) || (slot >= 4 && _chrMode == 1)) {
+			if(slot >= 4) {
 				page |= 0x100;
 			}
 			BaseMapper::SelectChrPage(slot, page, memoryType);
diff --git a/Core/NES/Mappers/Mmc3Variants/MMC3_187.h b/Core/NES/Mappers/Mmc3Variants/MMC3_187.h
index cdb8918dc..7ed2fedff 100644
--- a/Core/NES/Mappers/Mmc3Variants/MMC3_187.h
+++ b/Core/NES/Mappers/Mmc3Variants/MMC3_187.h
@@ -23,7 +23,7 @@ class MMC3_187 : public MMC3
 
 	void SelectChrPage(uint16_t slot, uint16_t page, ChrMemoryType memoryType = ChrMemoryType::Default) override
 	{
-		if((_chrMode && slot >= 4) || (!_chrMode && slot < 4)) {
+		if(slot >= 4) {
 			page |= 0x100;
 		}
 		BaseMapper::SelectChrPage(slot, page);