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-rw-r--r--basics/flicker.s1
1 files changed, 1 insertions, 0 deletions
diff --git a/basics/flicker.s b/basics/flicker.s
index 5677968..2cca1dd 100644
--- a/basics/flicker.s
+++ b/basics/flicker.s
@@ -184,6 +184,7 @@
stx $2001 ; PPUMASK
stx $4010 ; APU DMC
+ bit $2002 ; PPUSTATUS
@vblankwait1:
bit $2002 ; PPUSTATUS
bpl @vblankwait1