Make this my favourite ZXIO V2 8255A Experimenters Set - DIY Kit Build.

Retro Computers >> Sinclair >> Sinclair ZX81 >> Hardware >> General / Add-Ons
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Item Number : 64403

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ZXIO V2 8255A Experimenters Set - DIY Build Kit.

Based on a projectts by ZX81 Keyboard Adventure, the ZXIO V2 is a memory-mapped input/output (I/O) board designed for the ZX81, based around the 8255A-PPI (Programmable Peripheral Interface) IC. This I/O board emphasises simplicity: it is easy to build, easy to connect and interface with, and is accessible from ZX81 BASIC; which is a considerable plus on a ZX81.


Package Includes

  • ZXIO V2 PCB and parts: The main component of the kit and brains of the operation.

  • ZX BUS Expander PCB and parts: A ZX81 BUS extension card, the ZXIO or other cards of similar design can be attached to this board.

  • ZX IO LED Board and parts: A unique expansion board designed to be mounted directly to the ZXIO V2 expansion headers.

  • ZXIO Breakout Board and parts: Designed to be used in conjunction with a breadboard for experimentation and prototyping. (Breadboard not included).

  • IDC ribbon Cable.

The kits contain everything needed to build the base ZXIO V2 board, including an LED board and a breakout board. All parts are brand new, with the exception of the 8255A IC, which is a reclaimed component. This decision was made to manage costs effectively; sourcing new versions of this IC would significantly increase the kit cost.


***Note*** This is the DIY build kit. You should be confident with building electronics kits. The kit is not suitable for beginners. The completed unit is pictured.

 For Kit Build details see the ZXIO V2 Support Page

Computer Compatibility

The Interface and Keyboard are fully compatible with Sinclair hardware and software.

Compatible Systems:

  • Sinclair ZX81

  • Timex Sinclair 1000

  • ZX Minstrels 

Known Compatible Add-ons & Expansions:

  • ZXpand

  • ZXpand Plus

  • ZX81 ULA Replacement - By Andy Rea

  • vLA81 : A replacement for the Sinclair ZX81 ULA

  • All video Modifications will work without issue.

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