Interfaces and Options
The 480Z motherboard contained the processor and up to 128 KB of RAM as well as most of the external interfaces:
- Two serial interfaces (SIO-4 and SIO-2) – providing full and cut-down RS-232 interfaces, respectively.
- Parallel I/O – used either as a high-speed link for the external disk drives or ROM Packs, or as a Centronics printer port.
- Cassette interface.
- Accessory input – two channel analogue joystick interface.
- Composite video and audio.
- RF TV output.
- Network connection (optional).
The high resolution graphics and memory option board allowed an extra 128 KB of RAM to be added and included a TTL RGB monitor output. The option board could also be fitted with an IEEE-488 interface and an AMD 9511 or 9512 floating point coprocessor.