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-rw-r--r--constants/misc_constants.asm5
1 files changed, 5 insertions, 0 deletions
diff --git a/constants/misc_constants.asm b/constants/misc_constants.asm
index a0cc1d0a..5eecb38f 100644
--- a/constants/misc_constants.asm
+++ b/constants/misc_constants.asm
@@ -20,9 +20,14 @@ D_LEFT EQU %00100000
D_UP EQU %01000000
D_DOWN EQU %10000000
+PIXELS_PER_TILE EQU 8
+
SCREEN_WIDTH EQU 20
SCREEN_HEIGHT EQU 18
+SCREEN_WIDTH_PIXELS EQU SCREEN_WIDTH * PIXELS_PER_TILE
+SCREEN_HEIGHT_PIXELS EQU SCREEN_HEIGHT * PIXELS_PER_TILE
+
NPC_MOVEMENT_DOWN EQU $00
NPC_MOVEMENT_UP EQU $40
NPC_MOVEMENT_LEFT EQU $80