HP Forum Archive 15

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EPROM module for HP71B Message #1 Posted by Thomas Falk on 13 Nov 2005, 9:16 a.m. Hi folks, I have a HP71b with an EPROM module made by a company called Hand Held Products. It contains a 32KB EPROM with an application for hospitals, which is not very usefull for me. I found the dump of the JPC-ROM some time ago in the web and would like to use it with this module. Do I have to take care of something when burning the EPROM, or when inserting it in the HP71? I have tried it, but the HP71 doesn't seem to use the new EPROM. Any hints? Thanks, Thomas

Re: EPROM module for HP71B Message #2 Posted by J-F Garnier on 13 Nov 2005, 2:37 p.m., in response to message #1 by Thomas Falk I didn't program an EPROM for the HHP since a long time, but I remember that the content of the EPROM is complemented, i.e. EPROM's 00 bytes are read as FF, and FF bytes are read as OO. I believe it was designed so an empty EPROM (full of FF) behaves like non-exiting memory (returning 0, the RTNSXM opcode). J-F

Re: EPROM module for HP71B Message #3 Posted by Bill (Smithville, NJ) on 13 Nov 2005, 7:44 p.m., in response to message #1 by Thomas Falk Hi Thomas, If possible, please save copy of eprom file of the Hospital Application. While I have no use for it, there's probally someone here that might want to see it. I don't know how the dump would be done, but I'm sure someone here knows how to do it. I just hate to see any application disappear. Bill

Re: EPROM module for HP71B Message #4 Posted by Diego Diaz on 14 Nov 2005, 1:26 p.m., in response to message #3 by Bill (Smithville, NJ) Hi Thomas, In line with Bill's previous post, and if you dont have the time/equipment/skills to perform the EPROM copy, just let me know. I'll gladly send you a pair of blank ERPOM chips (of the same type) so you can re-program your module without having to erase the original Hospital application. Diego. NOTE: Of course, the above offer is ovbiously free of charge. Edited: 14 Nov 2005, 1:28 p.m.

Re: EPROM module for HP71B Message #5 Posted by Thomas Falk on 14 Nov 2005, 3:04 p.m., in response to message #4 by Diego Diaz Hi Bill and Diego, do not fear! If I get a new (old) computer, the first thing is to read the EPROMs, just in case. The application on my HP71 is calling itself STAT-TRAC/RT and made by STAT Systems Inc.. This company still exists, have a look at http://www.statsystems.com/. Is there a place for storing such EPROM images somewhere in the web? Hopyfully I will have time to test the tip given by J-F. at the weekend. Bye, Thomas

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