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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

Display

Register Display

photo of register display

Not much to say about this. It is simply LED's with built-in current limiting resistors, connected by way of buffers to the register outputs. It is not needed for proper operation of the computer, but it is critical in the troubleshooting phase. The display is also pleasing to watch when the computer is running. With a slow clock, it is easy to follow what the computer is doing.

Links to Original CPU pages:

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