Andre, I hadn't thought about your potential solution but might be worth a try.
The issues that I recall involve timing of the various pulses as well as the amplitude. Reading the chip is seemingly a much less problematic issue. However, with programming, timing becomes a more important issue. I suspect if you slow the process down a lot and make sure the timing is appropriate (meaning when the 'final voltage values' have stabilized) it might work. However, with old computers, its faster and cheaper to just buy an old programmer that supports the chip in question. I would be interested if anyone is able to address this and find a workable solution. Joe -----Original Message----- From: volt-nuts [mailto:[email protected]] On Behalf Of Andre Sent: Monday, March 30, 2020 1:14 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Solartron 7081 Hi Joe, what about just building a converter? Most PIC programmers output 11-13V so this could feasibly be adapted. ________________________________________ From: volt-nuts <[email protected]> on behalf of Rick Bale <[email protected]> Sent: 30 March 2020 19:01 To: [email protected] Subject: Re: [volt-nuts] Solartron 7081 Joe, I really want to experience using the eprom programmer first hand but haven't been able to find a USB based on that's below $100 that says it supports VPP of 25v. I think to spend more than that on tools that may not be used again isn't smart...although I have broken that guideline many times! I think using a USB to RS-232 or USB to parallel adapter makes for a good rabbit hole too. I successfully cancelled the programmer I already ordered as it didn't have high enough programming voltage even though it said it supported the TMS2564-JL chips. So, Joe, I'd like to take you up on your generous offer to read the old ones and program the new ROMs. I was able to confirm this morning that the ROMs I ordered are the correct versions. They should be here to my house by Thurs this week. I'll reach back out to you once they've arrive. I've also ordered a new battery for the B1 real time clock. It is dead. That should be here tomorrow. Will be interesting if the battery is part of the boot up problem. Thanks Rick > 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 > > > > > > > ---------- Forwarded message ---------- > From: "J. L. Trantham" <[email protected]> > To: "'Discussion of precise voltage measurement'" < > [email protected]> > Cc: > Bcc: > 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. > > > > _______________________________________________ > volt-nuts mailing list > [email protected] > http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com > _______________________________________________ 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. _______________________________________________ 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. _______________________________________________ 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.
