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A TTL approach to the HP-35
05-15-2021, 02:42 PM
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RE: A TTL approach to the HP-35
Interesting use of a dot matrix LCD to mimic the 41C display. At first glance I thought you were using a salvaged display. Have you compared your fullnut model to Monte's 41CL implementation? Nice keyboard for the Woodstock project.

Somewhere on the 'net is a description of a TTL implementation of the 6502 that I believe was marketed as a kit. The PCB silkscreen serves to annotate the sections of the chip design (ALU, register file, etc.) I think it even used an image of the decapped chip itself. I'll post a link when I can find it but here are a couple of similar projects that a search turned up. Should provide some inspiration for your own project.

https://c74project.com
http://baltissen.org/newhtm/ttl6502.htm

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Messages In This Thread
RE: A TTL approach to the HP-35 - teenix - 05-15-2021, 05:00 PM
RE: A TTL approach to the HP-35 - mfleming - 05-15-2021, 05:32 PM
RE: A TTL approach to the HP-35 - mfleming - 05-15-2021 02:42 PM
RE: A TTL approach to the HP-35 - mfleming - 05-16-2021, 02:01 PM
RE: A TTL approach to the HP-35 - teenix - 06-03-2021, 12:03 PM



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