ZON X-81
Self-contained sound unit; uses AY-3-8910 3 channel sound chip. Full instructions and programs supplied.
Timex/Sinclair 1000
ZX-G Expansion Unit
High resolution hardware unit with 48K RAM. Allow for creating memory-mapped images at 256×192 pixels. Graphics can be drawn, moved, rotated, mixed with text, saved on cassette or printed. Software on cassette supports drawing lines, circles and rectangles. Four high resolution screens can be stored in addition to 16K program. May have been later sold
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310 I/O port with real time clock
I/O board with our real time clock/calendar. 8 outputs capable of driving relays 8 TTL inputs Feed-through Sinclair bus connector to allow normal expansion Battery back-up for clock Expandable ports
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CAI/ESF Mass Storage Device
The CAI/ESF (Exatron Stringy Floppy) used endless-loop tapes and a small operating system to perform many of the functions available on disk operating systems. It could load or store 27K bytes in less than 30 seconds.
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