1 files changed, 9 insertions, 0 deletions
diff --git a/gbhw.asm b/gbhw.asm
index 0f12e4842..a2156c5b8 100644
--- a/gbhw.asm
+++ b/gbhw.asm
@@ -28,6 +28,15 @@ TIMER    EQU 2
 SERIAL   EQU 3
 JOYPAD   EQU 4
 
+; OAM attribute flags
+OAM_PALETTE   EQU %111
+OAM_TILE_BANK EQU 3
+OAM_OBP_NUM   EQU 4 ; Non CGB Mode Only
+OAM_X_FLIP    EQU 5
+OAM_Y_FLIP    EQU 6
+OAM_PRIORITY  EQU 7 ; 0: OBJ above BG, 1: OBJ behind BG (colors 1-3)
+
+
 ; Hardware registers
 rJOYP       EQU $ff00 ; Joypad (R/W)
 rSB         EQU $ff01 ; Serial transfer data (R/W)