I/O: Difference between revisions

*$FF02 - Serial control

*$FF04 - Divider

*$FF05 - Timer counter

*$FF06 - Timer modulo

*$FF07 - Timer control

*$FF0F - Interrupt flag

*$FF10-$FF26 - Audio

**$FF10-$FF14 - NR10-NR14

**$FF16-$FF1E - NR21-NR34

**$FF20-$FF23 - NR41-NR44

**$FF24-$FF26 - NR50-NR52

*$FF30-$FF3F - Wave pattern

*$FF40 - LCD control

*$FF41 - LCD stat

*$FF42 - Scroll y

*$FF43 - Scroll x

*$FF44 - LY

*$FF45 - LYC

*$FF46 - OAM DMA

*$FF47 - Bg pal

*$FF48 - Obj pal 0

*$FF49 - Obj pal 1

*$FF4A - Win y

*$FF4B - Win x

*$FF72 - Unknown

*$FF73 - Unknown

*$FF75 - Unknown (only bits 4-6 are read/write enabled)

*$FF76 - PCM12 - PCM amplitudes 1 & 2 (Read Only) (low nybble: copy of sound channel #1's PCM amplitude, high: copy of sound channel #2's)

*$FF77 - PCM34 - PCM amplitudes 3 & 4 (Read Only) (same as $FF76 but with channels 3/4)

*$FF4D - CGB Double Speed Mode/Normal Speed Mode switch

*$FF4F - VRAM bank select

*$FF51-$FF55 - VRAM DMA (HDMA)

**HDMA src hi

**HDMA src low

**HDMA dest hi

**HDMA dest low

**HDMA count

*$FF56 - Infrared port

*$FF68-$FF69 - BG/OBJ palettes

**$FF68 - Bg pal sel

**$FF69 - Bg pal data

**$FF6A - Obj pal sel

**$FF6B - Obj pal data

**$FF6C - Unknown

*$FF70 - WRAM bank select

*$FF74 - Unknown

==Also relevant==

*$FFFF - Interrupt enable register (IE)

<ref>[https://gbdev.gg8.se/wiki/articles/CGB_Registers GB Dev wiki CGB Registers]</ref><ref>BGB emulator</ref>