From BASIC-G Manual[1983/3].
I/O PORT
Z80CTC
- 00h
- Channel #1: SIO Int.
- 01h
- Channel #1: Peripheral Timer
- 02h
- Channel #2: SIO Clock Generator
- 03h
- Channel #3: VDP Blnaking(Frame) Interrupt
VDP TMS9918A
- 11h
- Status port
- 11h
- Screen base address & Control port
- 11h
- VRAM Address port
- 10h
- Data Read port
- 10h
- Data Write port
Sound Generator SN76489AN
- 20h
- Control
Keyboard
- 30h
- row#0
- 31h
- row#1
- 32h
- row#2
- 33h
- row#3
- 34h
- row#4
- 35h
- row#5
- 36h
- 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)
- 50h
- Input port(Bit 0)
- 50h
- Remote port(Bit 1)
Pararrel Out
- 40h
- DATA
- 50h
- STROBE(Bit 0)
- 50h
- BUSY(Bit 1)