480Z Schematics

These are greyscale 300dpi scans in PNG format.

LINK 480Z Main Board

• Processor support & port decoding (940 KB)
• Memory system - decoding/timing (715 KB)
• RAM & ROM arrays, character generator & power (510 KB)
• VDU circuitry (621 KB)
• TTL I/O ports - keyboard, user I/O, accessories, SIO-2 (908 KB)
• SIO, CTC & analogue - SIO/4, cassette & audio (798 KB)

LINK 480Z Option Board

• Add-on RAM (637 KB)
• High resolution graphics-1, bus interface & memory (443 KB)
• High resolution graphics-2, timing & video generation (723 KB)
• High resolution graphics-3, output stages (369 KB)
• IEEE interface, maths chip & CTC (683 KB)