ref: d3e942a8fe99666aa7148f3265d8c65f2269b322
parent: d7712c801982b83b9591b402f918498dbbedc458
author: Rangi <remy.oukaour+rangi42@gmail.com>
date: Thu Jul 5 18:00:13 EDT 2018
More LCDC bit constants
--- a/constants/hardware_constants.asm
+++ b/constants/hardware_constants.asm
@@ -58,10 +58,6 @@
Y_FLIP EQU 1 << OAM_Y_FLIP ; $40
PRIORITY 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)
@@ -119,14 +115,20 @@
rWave_e EQU $ff3e
rWave_f EQU $ff3f
rLCDC EQU $ff40 ; LCD Control (R/W)
+rLCDC_BG_PRIORITY EQU 0 ; 0=Off, 1=On
rLCDC_SPRITES_ENABLE EQU 1 ; 0=Off, 1=On
rLCDC_SPRITE_SIZE EQU 2 ; 0=8x8, 1=8x16
+rLCDC_BG_TILEMAP EQU 3 ; 0=9800-9BFF, 1=9C00-9FFF
+rLCDC_TILE_DATA EQU 4 ; 0=8800-97FF, 1=8000-8FFF
+rLCDC_WINDOW_ENABLE EQU 5 ; 0=Off, 1=On
rLCDC_WINDOW_TILEMAP EQU 6 ; 0=9800-9BFF, 1=9C00-9FFF
rLCDC_ENABLE EQU 7 ; 0=Off, 1=On
+LCDC_DEFAULT EQU (1 << rLCDC_ENABLE) | (1 << rLCDC_WINDOW_TILEMAP) | (1 << rLCDC_WINDOW_ENABLE) | (1 << rLCDC_SPRITES_ENABLE) | (1 << rLCDC_BG_PRIORITY)
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