From d056c4cbe305565a50a4ee9d60906d78fb119b4d Mon Sep 17 00:00:00 2001
From: John Tsiombikas <nuclear@member.fsf.org>
Date: Sun, 5 Jul 2020 12:49:07 +0300
Subject: [PATCH] fixed uninitialized per-tile hscroll table

---
 test.asm |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/test.asm b/test.asm
index eff673c..4c51874 100644
--- a/test.asm
+++ b/test.asm
@@ -15,6 +15,14 @@
 	sep #$20
 	.a8
 	.endmacro
+	.macro I16
+	rep #$10
+	.i16
+	.endmacro
+	.macro I8
+	sep #$10
+	.i8
+	.endmacro
 
 	; VMEM map
 	; 0000: tilemap for BG1 (32x32 4bpp: 512b)
@@ -256,6 +264,16 @@ snes_init:
 	stz REG_MDMAEN
 	stz REG_HDMAEN
 	stz REG_MEMSEL
+
+	; clear vmem
+	I16
+	setreg REG_VMAINC, $80
+	ldx $4000
+@clear:	stz REG_VMDATAL
+	stz REG_VMDATAH
+	dex
+	bne @clear
+	I8
 	rts
 
 	; cartridge header
-- 
1.7.10.4