Author: Craig Andrews
Bus Monitor Board – This Should Whet Your Appetite
I am getting more excited by the hour while building the SBC-85 Bus Monitor Board and so…
SBC-85 v1.1 Built
Update on version 1.1 of the SBC-85 CPU board that just arrived—- Rather than tease out the…
Backplane-4 Built and Ready to Share
I have completed building the first Backplane-4 and happy to report that i have not found any…
New PCBs, New Projects, New Plans
The last mile of power lines, telephone lines, and other similar infrastructure is the most difficult to…
Intel 8085 Instruction Reference Card
For those that can’t remember things like glass shampoo bottles and paper straws, the “100% Plastic” claim…
SBC-85 CPU v1.0 is now a Shared Project
Version 1.0 of the SBC-85 CPU board has been uploaded to PCBWAY and OSHPARK as a shared…
Which PCB Layout Program Do I Use? and Why?
I have been asked a number of times if I can recommend an EDA package for other…
Dave Dunfield’s MON85 Available for the SBC-85
Great news today when Dave Dunfield gave permission to port his MON85 code over to the SBC-85…
My Most Useful EPROM Programmers
I have at least a dozen EPROM programmers but most of them are vintage and less than…
Demystifying 8085 Hardware Interrupts
Hardware interrupts are simply signal inputs that are monitored by the CPU and when one (or more)…