ref: d3da137de8bf394e2780c19a91dabf722cb757b4
parent: f74ec1053e33dc5e56e9476076ed7ae7e7e84fef
author: Colton G. Rushton <colton51919@gmail.com>
date: Sun Jul 3 22:10:24 EDT 2022
Add object priority mode constant and remove unnecessary constants (#972) The rest of the unknown constants aren't even registers and can safely be removed without issue.
--- a/constants/hardware_constants.asm
+++ b/constants/hardware_constants.asm
@@ -155,12 +155,8 @@
DEF rOBPI EQU $ff6a ; CGB Mode Only - Sprite Palette Index
DEF rOBPI_AUTO_INCREMENT EQU 7 ; increment rOBPI after write to rOBPD
DEF rOBPD EQU $ff6b ; CGB Mode Only - Sprite Palette Data
-DEF rUNKNOWN1 EQU $ff6c ; (FEh) Bit 0 (Read/Write) - CGB Mode Only
+DEF rOPRI EQU $ff6c ; CGB Mode Only - Object Priority Mode
DEF rSVBK EQU $ff70 ; CGB Mode Only - WRAM Bank
-DEF rUNKNOWN2 EQU $ff72 ; (00h) - Bit 0-7 (Read/Write)
-DEF rUNKNOWN3 EQU $ff73 ; (00h) - Bit 0-7 (Read/Write)
-DEF rUNKNOWN4 EQU $ff74 ; (00h) - Bit 0-7 (Read/Write) - CGB Mode Only
-DEF rUNKNOWN5 EQU $ff75 ; (8Fh) - Bit 4-6 (Read/Write)
DEF rPCM12 EQU $ff76 ; Channel 1 & 2 Amplitude (R)
DEF rPCM34 EQU $ff77 ; Channel 3 & 4 Amplitude (R)
DEF rIE EQU $ffff ; Interrupt Enable (R/W)