From 14b496ae1c98fb8ce6b125b369e964b3dd62a991 Mon Sep 17 00:00:00 2001
From: Greg Shuflin <greg.shuflin@protonmail.com>
Date: Mon, 13 Jun 2022 18:06:18 -0700
Subject: [PATCH] Manually clear screen

If I don't do this I get gibberish in most emulators
(apparently not SNES9x)
---
 homebrew-tutorial/main.asm | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/homebrew-tutorial/main.asm b/homebrew-tutorial/main.asm
index fcd4862..ddcc2ad 100644
--- a/homebrew-tutorial/main.asm
+++ b/homebrew-tutorial/main.asm
@@ -65,6 +65,16 @@ start:
     cpx #(charset_end - charset)
     bne @charset_loop
 
+; Manually clear screen
+    ldx #(VRAM_BG1)
+@loop:
+    stx VMADDL
+    stz VMDATAL
+    stz VMDATAH
+    inx
+    cpx #(VRAM_BG1 + 32 * 29)
+    bne @loop
+
     ; write tile to position (1, 1)
     TILE_X = 1
     TILE_Y = 1