Manually clear screen

If I don't do this I get gibberish in most emulators (apparently not SNES9x)
2022-06-13 18:06:18 -07:00 · 2022-06-13 18:06:18 -07:00 · 14b496ae1c
parent f6efec6961
commit 14b496ae1c
1 changed files with 10 additions and 0 deletions
--- 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