Manually clear screen

If I don't do this I get gibberish in most emulators
(apparently not SNES9x)

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

justfile

@@ -1,6 +1,9 @@
 default:
     just --list
 
+run-homebrew: homebrew-tutorial
+    mesen-s ./out/main.sfc
+
 homebrew-tutorial:
     mkdir -p out
     ca65 ./homebrew-tutorial/main.asm -o ./out/main.o -g