From 7ee7734a73f728107622eb72c68f5bbfbef3d821 Mon Sep 17 00:00:00 2001
From: Vicki Pfau <vi@endrift.com>
Date: Mon, 18 May 2020 18:25:03 -0700
Subject: [PATCH] GBA BIOS: Reset renderer when RegisterRamReset called (fixes
 #1756)

---
 CHANGES        | 1 +
 src/gba/bios.c | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/CHANGES b/CHANGES
index 729ec6d9c..c4d665630 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3,6 +3,7 @@
  - GB MBC: Support 4MB MBC30 ROMs (fixes mgba.io/i/1713)
  - GB Video: Fix BGPS value after skipping BIOS (fixes mgba.io/i/1717)
  - GBA: Add missing RTC overrides for Legendz games
+ - GBA BIOS: Reset renderer when RegisterRamReset called (fixes mgba.io/i/1756)
  - GBA SIO: Fix Multiplayer busy bit
  - GBA SIO: Fix double-unloading active driver
  - GBA Timers: Fix deserializing count-up timers
diff --git a/src/gba/bios.c b/src/gba/bios.c
index a264354eb..3045fb46c 100644
--- a/src/gba/bios.c
+++ b/src/gba/bios.c
@@ -177,6 +177,9 @@ static void _RegisterRamReset(struct GBA* gba) {
 		cpu->memory.store16(cpu, BASE_IO | 0x204, 0, 0);
 		cpu->memory.store16(cpu, BASE_IO | 0x208, 0, 0);
 	}
+	if (registers & 0x9C) {
+		gba->video.renderer->reset(gba->video.renderer);
+	}
 }
 
 static void _BgAffineSet(struct GBA* gba) {