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-rw-r--r--constants/hardware_constants.asm15
1 files changed, 9 insertions, 6 deletions
diff --git a/constants/hardware_constants.asm b/constants/hardware_constants.asm
index b84419815..7e7681acf 100644
--- a/constants/hardware_constants.asm
+++ b/constants/hardware_constants.asm
@@ -50,6 +50,7 @@ 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)
+; BP Map attribute flags
PALETTE_MASK EQU %111
VRAM_BANK_1 EQU 1 << OAM_TILE_BANK ; $08
OBP_NUM EQU 1 << OAM_OBP_NUM ; $10
@@ -57,6 +58,10 @@ X_FLIP EQU 1 << OAM_X_FLIP ; $20
Y_FLIP EQU 1 << OAM_Y_FLIP ; $40
BEHIND_BG EQU 1 << OAM_PRIORITY ; $80
+; Other useful constants
+LCDC_DEFAULT EQU %11100011
+LY_VBLANK EQU 144
+
; Hardware registers
rJOYP EQU $ff00 ; Joypad (R/W)
rSB EQU $ff01 ; Serial transfer data (R/W)
@@ -114,16 +119,14 @@ rWave_d EQU $ff3d
rWave_e EQU $ff3e
rWave_f EQU $ff3f
rLCDC EQU $ff40 ; LCD Control (R/W)
-rLCDC_SPRITE_ENABLE EQU 1
-rLCDC_SPRITE_SIZE EQU 2
-rLCDC_WINDOW_TILEMAP EQU 6
-rLCDC_ENABLE EQU 7
-rLCDC_DEFAULT EQU %11100011
+rLCDC_SPRITES_ENABLE EQU 1 ; 0=Off, 1=On
+rLCDC_SPRITE_SIZE EQU 2 ; 0=8x8, 1=8x16
+rLCDC_WINDOW_TILEMAP EQU 6 ; 0=9800-9BFF, 1=9C00-9FFF
+rLCDC_ENABLE EQU 7 ; 0=Off, 1=On
rSTAT EQU $ff41 ; LCDC Status (R/W)
rSCY EQU $ff42 ; Scroll Y (R/W)
rSCX EQU $ff43 ; Scroll X (R/W)
rLY EQU $ff44 ; LCDC Y-Coordinate (R)
-LY_VBLANK EQU 144
rLYC EQU $ff45 ; LY Compare (R/W)
rDMA EQU $ff46 ; DMA Transfer and Start Address (W)
rBGP EQU $ff47 ; BG Palette Data (R/W) - Non CGB Mode Only