[sdiy-market] [FOR SALE] Willem EPROM programmer

Steve Lenham steve at bendentech.co.uk
Tue Oct 5 11:23:01 CEST 2021


The Willem programmer was an open-source DIY design that enjoyed many 
iterations and still forms the basis of a lot of the cheap Far Eastern 
This one was built by my own fair hand using a commercial PCB (version 
3.1 ATH, if you are Googling) and I used it for many years before upgrading.
Plenty of information is still available online including the driver 

Settings are made manually using jumpers and DIP switches, which means 
you need to be careful but also makes it a very versatile device, 
capable of programming all sorts of things (EPROM, EEPROM, FLASH, 
micros, etc.).
Communication with the host PC is via the old-school parallel port (and 
it needs to be a "real" one).

This one comes with a couple of adaptors that are particularly useful 
for vintage synths:

- Adaptor for 2716 and 2732 EPROMs. The Willem handles larger EPROMs 
directly but needs a pin adaptor for these. This is what I used most.

- Adaptor for reading and writing Intel MCS-48 microcontrollers. This 
will read mask-ROM 8048/49s as found in a lot of early Roland synths and 
program the EPROM equivalents (8748/49).

Willem programmer

Overall, a very useful device if you are willing to get a bit "hands-on" 
- which hopefully everyone here is :-)

Asking GBP25 plus postage cost to wherever you are.

Please get in touch with any interest or questions!


Steve L.
Benden Sound Technology
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