Willem programmer adapter for eprom 27HC641 ( commodore use ) \ VOGONS

Willem programmer adapter for eprom 27HC641 ( commodore use )

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First post, by tinmachine2

Posted on 2025-11-23, 23:15

tinmachine2 Offline

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Hello Folks
I have a Willem PCB 5.0B programmer and I need an adapter to program 27hc641 eproms. Does anyone know where to find one?
n general, to program the 27HC641 you try to modify the programmer. The Willem actually only needs an adapter to establish the correct pins.
Has anyone in the group ever made one?

Reply 1 of 2, by Zup

Posted on 2025-11-24, 05:46

Zup Offline

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Does a Willem allow to program 2364? I mean, does the software allows you to select a 2364?

And, knowing that the only pins that change are address ones... wouldn't it be easier to convert the binary file?

Also, keep in mind that the pins are not the only thing that defines how an EPROM should be programmed. You'll probably have to change the timings of the burner.

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Reply 2 of 2, by jmarsh

Posted on 2025-11-24, 07:19

jmarsh Offline

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Agreed, the easier way would be to reorder the data to account for the different addresses. There's no timings to change (the original 2364 is a ROM rather than a PROM) as long as the programmer knows how to write a 27HC641 - that screenshot of the 32-ZIF pinout doesn't exactly inspire confidence.

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