HP Forum Archive 21

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CMT EPROM Info Sought Message #1 Posted by Namir on 17 May 2012, 12:37 p.m. Hi All, I recently bought an HP-41CX through eBay from Israel. The machine came with what seems a 16K CMT Eprom module. Does anyone one have information about this module? I can only access one command, called CMTTST, which runs a diagnostic test on the module. Namir Edited: 17 May 2012, 12:53 p.m.

Re: CMT EPROM Info Sought Message #2 Posted by Ángel Martin on 17 May 2012, 1:51 p.m., in response to message #1 by Namir Same here- well almost, I only bought the EPROM not the 41. I looked at the code, which amazingly fills up the first 4k block. Not sure that it´d have any usefulness other than diagnosing the EPROM itself, but I haven´t looked carefully enough. Maybe in a few weeks, but not sure...

Re: CMT EPROM Info Sought Message #3 Posted by M. Joury on 17 May 2012, 3:41 p.m., in response to message #1 by Namir There seems to be several of those unit available. I would love to hear if the EPROM gets figured out. Cheers, -Marwan

Re: CMT EPROM Info Sought Message #4 Posted by Allen on 17 May 2012, 7:06 p.m., in response to message #1 by Namir It's probably a CMT-10 module - supposed to be used with the DATA-I/O 21A EPROM programmer and the CMT programming adapter. Mathias has the only known programmer that I'm aware of,See the first programmer here. Here's a photo: And the brochure for programming:

Re: CMT EPROM Info Sought Message #5 Posted by Ángel Martin on 18 May 2012, 2:27 a.m., in response to message #4 by Allen Yes it´s got to be the CMT-10, no doubt. As for re-programming it, afraid we can forget about those units held in collector's hands (shame, shame...)

Re: CMT EPROM Info Sought Message #6 Posted by Namir on 18 May 2012, 3:34 a.m., in response to message #4 by Allen Thanks Allen!!! I guess it's time to plan another visit to Matthias's place! :-) Namir Edited: 18 May 2012, 6:18 a.m.

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