diff --git a/src/gb/io.c b/src/gb/io.c
index 5b547323f..4009bfb41 100644
--- a/src/gb/io.c
+++ b/src/gb/io.c
@@ -84,6 +84,15 @@ void GBIOReset(struct GB* gb) {
 	GBIOWrite(gb, REG_OBP1, 0xFF);
 	GBIOWrite(gb, REG_WY, 0x00);
 	GBIOWrite(gb, REG_WX, 0x00);
+	GBIOWrite(gb, REG_VBK, 0);
+	GBIOWrite(gb, REG_BCPS, 0);
+	GBIOWrite(gb, REG_OCPS, 0);
+	GBIOWrite(gb, REG_SVBK, 1);
+	GBIOWrite(gb, REG_HDMA1, 0xFF);
+	GBIOWrite(gb, REG_HDMA2, 0xFF);
+	GBIOWrite(gb, REG_HDMA3, 0xFF);
+	GBIOWrite(gb, REG_HDMA4, 0xFF);
+	gb->memory.io[REG_HDMA5] = 0xFF;
 	GBIOWrite(gb, REG_IE, 0x00);
 }