From BASIC-G MANUAL [ 1983/3 ].
I/O PORT
Z80CTC
- 00h
- Channel #1: SIO Int.
Channel #1: Peripheral Timer
- Channel #2: SIO Clock Generator
- Channel #3: VDP Blnaking (Frame) Interrupt
VDP TMS9918A
- 11h
- Status port
- Screen base address & Control port
- VRAM Address port
- Data Read port
- Data Write port
Sound Generator SN76489AN
- 20h
- Control
Keyboard
- 30h
- Row#0
- row#1
- row#2
- row#3
- row#4
- row#5
- row#6
Joypad/Attack switch
- 37h
- Joypad Direction Input
RESET/HALT key
- 50h
- Reset/Halt Key data port (Bit 7)
Cassette tape recorder
- 50h
- Output port (Bit 0)
- Input port (Bit 0)
- Remote port (Bit 1)
Pararrel Out
- 40h
- DATA
- STROBE (Bit 0)
- BUSY (Bit 1)