ref: 8bbfa54059a3d4a242ff530e87c034ec48f5f4eb
dir: /gbhw.asm/
; Graciously aped from http://nocash.emubase.de/pandocs.htm . rJOYP EQU $ff00 ; Joypad (R/W) rSB EQU $ff01 ; Serial transfer data (R/W) rSC EQU $ff02 ; Serial Transfer Control (R/W) rDIV EQU $ff04 ; Divider Register (R/W) rTIMA EQU $ff05 ; Timer counter (R/W) rTMA EQU $ff06 ; Timer Modulo (R/W) rTAC EQU $ff07 ; Timer Control (R/W) rIF EQU $ff0f ; Interrupt Flag (R/W) rNR10 EQU $ff10 ; Channel 1 Sweep register (R/W) rNR11 EQU $ff11 ; Channel 1 Sound length/Wave pattern duty (R/W) rNR12 EQU $ff12 ; Channel 1 Volume Envelope (R/W) rNR13 EQU $ff13 ; Channel 1 Frequency lo (Write Only) rNR14 EQU $ff14 ; Channel 1 Frequency hi (R/W) rNR21 EQU $ff16 ; Channel 2 Sound Length/Wave Pattern Duty (R/W) rNR22 EQU $ff17 ; Channel 2 Volume Envelope (R/W) rNR23 EQU $ff18 ; Channel 2 Frequency lo data (W) rNR24 EQU $ff19 ; Channel 2 Frequency hi data (R/W) rNR30 EQU $ff1a ; Channel 3 Sound on/off (R/W) rNR31 EQU $ff1b ; Channel 3 Sound Length rNR32 EQU $ff1c ; Channel 3 Select output level (R/W) rNR33 EQU $ff1d ; Channel 3 Frequency's lower data (W) rNR34 EQU $ff1e ; Channel 3 Frequency's higher data (R/W) rNR41 EQU $ff20 ; Channel 4 Sound Length (R/W) rNR42 EQU $ff21 ; Channel 4 Volume Envelope (R/W) rNR43 EQU $ff22 ; Channel 4 Polynomial Counter (R/W) rNR44 EQU $ff23 ; Channel 4 Counter/consecutive; Inital (R/W) rNR50 EQU $ff24 ; Channel control / ON-OFF / Volume (R/W) rNR51 EQU $ff25 ; Selection of Sound output terminal (R/W) rNR52 EQU $ff26 ; Sound on/off rLCDC EQU $ff40 ; LCD Control (R/W) 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) 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 rOBP0 EQU $ff48 ; Object Palette 0 Data (R/W) - Non CGB Mode Only rOBP1 EQU $ff49 ; Object Palette 1 Data (R/W) - Non CGB Mode Only rWY EQU $ff4a ; Window Y Position (R/W) rWX EQU $ff4b ; Window X Position minus 7 (R/W) rKEY1 EQU $ff4d ; CGB Mode Only - Prepare Speed Switch rVBK EQU $ff4f ; CGB Mode Only - VRAM Bank rHDMA1 EQU $ff51 ; CGB Mode Only - New DMA Source, High rHDMA2 EQU $ff52 ; CGB Mode Only - New DMA Source, Low rHDMA3 EQU $ff53 ; CGB Mode Only - New DMA Destination, High rHDMA4 EQU $ff54 ; CGB Mode Only - New DMA Destination, Low rHDMA5 EQU $ff55 ; CGB Mode Only - New DMA Length/Mode/Start rRP EQU $ff56 ; CGB Mode Only - Infrared Communications Port rBGPI EQU $ff68 ; CGB Mode Only - Background Palette Index rBGPD EQU $ff69 ; CGB Mode Only - Background Palette Data rOBPI EQU $ff6a ; CGB Mode Only - Sprite Palette Index rOBPD EQU $ff6b ; CGB Mode Only - Sprite Palette Data rUNKNOWN1 EQU $ff6c ; (FEh) Bit 0 (Read/Write) - CGB Mode Only rSVBK EQU $ff70 ; CGB Mode Only - WRAM Bank rUNKNOWN2 EQU $ff72 ; (00h) - Bit 0-7 (Read/Write) rUNKNOWN3 EQU $ff73 ; (00h) - Bit 0-7 (Read/Write) rUNKNOWN4 EQU $ff74 ; (00h) - Bit 0-7 (Read/Write) - CGB Mode Only rUNKNOWN5 EQU $ff75 ; (8Fh) - Bit 4-6 (Read/Write) rUNKNOWN6 EQU $ff76 ; (00h) - Always 00h (Read Only) rUNKNOWN7 EQU $ff77 ; (00h) - Always 00h (Read Only) rIE EQU $ffff ; Interrupt Enable (R/W)