Full-size, full-stroke, 53 key, fully assembled, gold contact keyboard for all Sinclair ZX80/ZX81, MicroAce, and TS 1000 computers. Full-length space bar and 2 oversized shift keys for easier typing. Includes plans and schematics for three special circuits you can build to utilize the 12 extra keys: electronic shift-lock, automatic repeat, automatic shift.
Double “H” Keyboard Read More »
Modular interface system to permit real-time application of the ZX80/81. Connected by motherboard; 5 modules available. The RD 8100 is a modular interface system capable of performing a wide variety of scientific tasks, when coupled with a Sinclair Computer (ZX 81 and Spectrum). Flexibility and compatability are built into the system, which is simple to
Ultimate spelling program for ZX80/81. For use in the home or school. Program features a current list and a “wordpool” built up from previous lists. Uses a corrective routine with graphics. 4K ROM and 8K ROM versions. 16K.
This motherboard provides four 44-pin card connectors, room for wire wrap and voltage regulator. Eight chips are needed, five for buffers and three for decoding bi-directional data bus buffers. Budget Robotics & Computing purchased the rights to make and sell the Computer Continuum board in 1984.
Buffered Bus Expansion Board Read More »
Programmable 8255 PIA. Space for analog-to-digital converter, relays, clock chip, etc. Expansion connector for RAM pack.
Complete schematic, parts list, sources, and how-to.
Add on RAM for ZX80 instructions Read More »
