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-rw-r--r--src/constants/sgb_constants.asm13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/constants/sgb_constants.asm b/src/constants/sgb_constants.asm
index e956881..6ba250e 100644
--- a/src/constants/sgb_constants.asm
+++ b/src/constants/sgb_constants.asm
@@ -23,3 +23,16 @@ ATTR_TRN EQU $15 ; Set Attribute from ATF
ATTR_SET EQU $16 ; Set Data to ATF
MASK_EN EQU $17 ; Game Boy Window Mask
OBJ_TRN EQU $18 ; Super NES OBJ Mode
+
+ATTR_BLK_CTRL_INSIDE EQU 1
+ATTR_BLK_CTRL_LINE EQU 2
+ATTR_BLK_CTRL_OUTSIDE EQU 4
+
+MLT_REQ_1_PLAYER EQU 0
+MLT_REQ_2_PLAYERS EQU 1
+MLT_REQ_4_PLAYERS EQU 3
+
+MASK_EN_CANCEL_MASK EQU 0
+MASK_EN_FREEZE_SCREEN EQU 1
+MASK_EN_BLANK_SCREEN_BLACK EQU 2
+MASK_EN_BLANK_SCREEN_COLOR_0 EQU 3