All, Here's an update on my 7081 that hangs during boot up with all the LED staying lit. Joe Trantham has been kind enough to check the programming of my current five 2564 ROM's and the programming looks complete as compared to David Partridge's bin files. So we don't have a lot of confidence that changing out the ROM's with new ones will fix the booting problem. Before Joe ships the ROM's back to me we thought we ask the group more about the ROM's used in with the different S/N
My IC803 is a Fujitsu MBM2764-30 ROM which corresponds to the later serial number of my unit, S/N 001159. The product status chart on the back of the meter shows 1 through 12 crossed off. 13-24 is not crossed of on the chart. When I received the unit off ebay I found that 3 of the RAM chips were in backwards and all the ROM's IC412-415, IC430 were in the wrong sockets, albeit oriented correctly. Joe suggested maybe somebody harvested the original 2764 ROM's and threw back in some 2564's from an earlier unit. The reason for suspecting this is because my 2564's are labelled CC which indicates an early firmware version. Possibly earlier than my serial number. Joe's own 7081, S/N 000660, has five 2764's marked DC firmware. Is it possible my S/N 001159 should have has 2764 ROM's on the Earthy Processor board? Does anyone know how to correspond the S/N ranges with the original ROM's that were used? When did the change over to 2764's take place? I would imagine that due to the different pin outs between 2564 and 2764's that the board has to be slightly different. But the schematics don't show how they accommodated the differences and is showing only the five 2564 on the Earthy Processor board. The parts list does show an asterisk stating that later S/N used 2764 ROM's on the Floating Logic board which mine does have a single 2764 in that socket. The schematic shows split pads were used to rewire different RAM chips, but I don't see any indication where split pads are being used for the two different ROM's types. Thanks Rick > > > Date: Sun, 29 Mar 2020 09:29:33 -0500 > > Subject: Re: [volt-nuts] Solartron 7081 > > Rick, > > > > The older programmers, generally, require a Parallel Port. Parallel > Ports > > seem to have vanished though I have a Win7 machine with one. Haven't > tried > > to use any of the older software with it though. > > > > I have several older machines with WinXP and these almost all came with a > > Parallel Port. And, you could add additional Parallel Ports with PCI > > cards. > > I have three programmers connected to one of my computers. > > > > My favorite computer for this is the Dell Latitude D610 which I think was > > the last Dell Laptop with a Parallel Port. Also has USB and Serial. > These > > seem to be relatively cheap on theBay. Depending on the 'total cost', > > might > > be worthwhile to get an older computer with WinXP and an older programmer > > rather than the usual several hundred dollars for a newer USB programmer. > > > > I just looked at my 7081's and (re)discovered that they both have their > > 'Calibration Seals' in place when calibrated by Ametek (formerly > Solartron) > > several years ago. I would like to avoid opening them if possible. I'll > > chase down the EPROM files referenced earlier in the thread to be able to > > compare your chips with. If your chips are bad (can't be read or > > programmed), I'll use those files to program your new chips. > > > > I went looking for my stash of EPROM's but, so far, I can't find it. I > > don't remember if I have those chips or not. I did find some TMS2516's > so > > maybe I do have the chips if I can find the 'mother lode'. Hopefully, > you > > can get the chips. > > > > Joe > > > > -----Original Message----- > > From: volt-nuts [mailto:[email protected]] On Behalf Of > > David > > C. Partridge > > Sent: Sunday, March 29, 2020 3:45 AM > > To: 'Discussion of precise voltage measurement' > > Subject: Re: [volt-nuts] Solartron 7081 > > > > If you have the pocket depth then I would suggest a Galep-5 (made by > > Conitec) EPROM programmer. > > > > I have its baby brother (Galep-4) but that needs a parallel port. > > > > It's a USB device and will handle the older stuff like 2564s quite > happily > > and also the new serial EEPROMs > > > > David > > > > > > _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com and follow the instructions there.
