From c2ee50288bb14a2b7673154f67d9bf8868b4d502 Mon Sep 17 00:00:00 2001
From: Vicki Pfau <vi@endrift.com>
Date: Sat, 5 Sep 2020 15:53:31 -0700
Subject: [PATCH] GBA I/O: Green swap register should be readable

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

diff --git a/CHANGES b/CHANGES
index dc2e600c4..899042f7b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -31,6 +31,7 @@ Emulation fixes:
  - GBA DMA: Linger last DMA on bus (fixes mgba.io/i/301 and mgba.io/i/1320)
  - GBA DMA: Fix ordering and timing of overlapping DMAs
  - GBA Hardware: Fix GB Player detection on big endian platforms
+ - GBA I/O: Green swap register should be readable
  - GBA Memory: Improve gamepak prefetch timing
  - GBA Memory: Stall on VRAM access in mode 2 (fixes mgba.io/i/190)
  - GBA Memory: Improve robustness of Matrix memory support
diff --git a/src/gba/io.c b/src/gba/io.c
index 87c519d4d..6a1037bf3 100644
--- a/src/gba/io.c
+++ b/src/gba/io.c
@@ -850,6 +850,7 @@ uint16_t GBAIORead(struct GBA* gba, uint32_t address) {
 		}
 		// Fall through
 	case REG_DISPCNT:
+	case REG_GREENSWP:
 	case REG_DISPSTAT:
 	case REG_VCOUNT:
 	case REG_BG0CNT: