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-rw-r--r--include/ppu.s4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/ppu.s b/include/ppu.s
index fa0df19..dd24422 100644
--- a/include/ppu.s
+++ b/include/ppu.s
@@ -5,4 +5,8 @@
SCROLL = $2005
ADDRESS = $2006
DATA = $2007
+
+ ;; Shadow for the PPU::CONTROL value. Touch this value instead of accessing
+ ;; the PPU register directly.
+ zp_control = $80
.endscope