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Donn Stewart
13917 Deviar Dr
Centreville, VA 20120
dstew@cpuville.com

Designing, Building, and Selling Obsolete Computers -- for Educational Purposes -- since 2004

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8-bit processor kit home 8-bit processor kit Register display kit Z80 socket adapter kit 40-conductor connector Accessories Instructions News and issues How to order
Z80 Kits home Single-board computer kit Bus display kit for single-board computer Original computer kit Bus display kit for original computer Logic probe kit Serial interface kit Disk and memory expansion kit Accessories Instructions News and issues How to order
Projects home Z80 wire wrap Original processor 8-bit processor Standalone Z80 computer
Educational home Logic gates Decoders Registers Buffers AND-OR array logic
Z80 kits and projects Tiny BASIC CP/M Original processor 8-bit processor
Z80 kit videos 8-bit processor videos

8-bit Processor Schematics

The schematic diagrams were made using Kicad, and are rather large, since unlike the schematics of the original processor, I put the whole circuit for each board on one diagram.

ALU schematic


Control board schematic


Data path schematic

8-bit processor links:

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Control logic home Control signals details Finite state machine details