CMT71-64E HP-71b eprom module questions

[KimH]

(04-28-2021 09:41 AM)dmh Wrote:  

(04-28-2021 08:02 AM)KimH Wrote:  The easiest way is to set DELAY 2 (all displayed messages are "paused" for 2 seconds) or whatever you fancy.

TEST32KE LEX is what CMT had on the module from Factory (64k modules would have TEST64KE), as are the two with EPRM*** and the CLONE program.

The command in TEST32KE is ROMTST which will tell you if the ROM is OK or not OK.

If your Google CMT71-P01 you will get to know a bit more about the EPROM Burner and the programs just mentioned

Add: The reason I know a bit about this - without owning a ROM-Burner, is that I have spent some time understanding the EPROM and Burner. I have an open agreement to meet an owner of a working CMT71-P01 in Switzerland as soon as the C-19 pandemic tapers off...

So how many burners were made and are still in service I wonder?

Ok, so SHOWPORT shows the module is 64k but ROMTST says 'BAD ROM'. I've tried a few commands and they appear to work.

Could this be because it's the wrong test (the 32k test is loaded on a 64k module)?

I don't think there were many built - doubt anyone knows. AFAIK there are about 6-7 folks (all active in this forum) who has one which works.

I am almost certain the BAD comes from the size OR that the ROM checksum generated originally by PTGENC$, is wrong or never generated before the burn.

If you found the document, look at page 15

What you can try is the command - DISP PTSIZE$ (':PORT(n)') - 32k would give h10000 or double that with 64K