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EPROM programmer for older chips?


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#1 Vorticon OFFLINE  

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Posted Thu May 31, 2018 6:16 AM

Hi.

I've come to realize that having an EPROM programmer that can handle the older 8-bit EPROMs is essential for the retrocomputing hobby. I have a version of the inexpensive and popular TL886 programmer, but it cannot handle most vintage EPROMs. I ran into that problem when trying to replace the Cortex EPROMs.

Currently I have a specific need to program a 2532 and a 2716 EPROM to upgrade the ROMs on my Heathkit H19 terminal so it can do 8-bit serial communication instead of its fixed 7-bit, thus making it much more useful. I usually use it to communicate with my Heathkit Hero Jr robot, but otherwise it sits idle and forlorn. I recently fixed my P112 CP/M SBC and I would love to use the H19 to connect to it :)

Any suggestions on an EPROM programmer that can handle the job? 



#2 atrax27407 OFFLINE  

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Posted Thu May 31, 2018 6:21 AM

Please look at the TL866 pinned thread in the "Development" forum. The TL866 WILL do TMS2532 and the equivalent MCM2532C EPROMs with the appropriate adapter. Both are very tolerant of undervoltage programming and work very nicely at 21V. The 2716 is another matter entirely, it is "hard wired" to program at 25V only.



#3 FDOS OFFLINE  

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Posted Thu May 31, 2018 10:44 AM

I have an old Prolog EPROM programmer that has a plug-in for 2716 and one for 2708, that I would be willing to trade.  If you have something I might be interested in?  Or make an offer, if you're interested.



#4 Vorticon OFFLINE  

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Posted Thu May 31, 2018 4:30 PM

Please look at the TL866 pinned thread in the "Development" forum. The TL866 WILL do TMS2532 and the equivalent MCM2532C EPROMs with the appropriate adapter. Both are very tolerant of undervoltage programming and work very nicely at 21V. The 2716 is another matter entirely, it is "hard wired" to program at 25V only.

 

Thanks for the tip. I should be able to construct the necessary adapter for the 2532.



#5 Vorticon OFFLINE  

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Posted Thu May 31, 2018 4:33 PM

I have an old Prolog EPROM programmer that has a plug-in for 2716 and one for 2708, that I would be willing to trade.  If you have something I might be interested in?  Or make an offer, if you're interested.

 

I might. How does the programmer connect to the PC (USB, serial, parallel) and is it DOS based or Windows based?



#6 FDOS OFFLINE  

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Posted Thu May 31, 2018 6:41 PM

It's stand-alone, so very old.  It has a socket for the EPROM, and a ultra-violet chamber.  It's all contained in a special briefcase.



#7 Vorticon OFFLINE  

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Posted Thu May 31, 2018 9:14 PM

It's stand-alone, so very old.  It has a socket for the EPROM, and a ultra-violet chamber.  It's all contained in a special briefcase.

 

So how is the ROM binary file sent to the EPROM?



#8 Stuart OFFLINE  

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Posted Fri Jun 1, 2018 5:51 AM

 

So how is the ROM binary file sent to the EPROM?

 

Well, there's this row of 8 toggle switches .... ;-)



#9 Vorticon OFFLINE  

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Posted Fri Jun 1, 2018 6:02 AM

 

Well, there's this row of 8 toggle switches .... ;-)

 

Done that with my ELF and the most I've entered is a little over 100 bytes, enough to start getting callouses on my fingers  :P

I don't toggling in 8K is something I would want to embark on...

Now that said, there might be a way to wire up a computer to the burner and program it that way, like I've done with my ELF below... 

 



#10 FDOS OFFLINE  

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Posted Fri Jun 1, 2018 10:11 AM

 

So how is the ROM binary file sent to the EPROM?

 

Unfortunately, I only used this device to patch the code already in the EPROM.  Which required me to key the address and values, address by address using the device keypad. It does have source and copy sockets, so an entire 2716 can be copied, and then patched.  Exactly, what I normally did in the field.  However it also has old serial and parallel ports, but I never had the occasion to use either.  It is rather heavy, as it's really in a small suitcase rather than a briefcase, as I just went out in the garage and looked at it.



#11 RickyDean OFFLINE  

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Posted Fri Jun 1, 2018 10:45 AM

 

Unfortunately, I only used this device to patch the code already in the EPROM.  Which required me to key the address and values, address by address using the device keypad. It does have source and copy sockets, so an entire 2716 can be copied, and then patched.  Exactly, what I normally did in the field.  However it also has old serial and parallel ports, but I never had the occasion to use either.  It is rather heavy, as it's really in a small suitcase rather than a briefcase, as I just went out in the garage and looked at it.

Probably a lot like my GangPro-8 from Logical Devices, it does program from a master eprom, but I would like to program individual eproms from the computer. The problem is the software I have found so far doesn't seems to recognize the device, and I haven't found any documentation on how to use it. It does have a RS232 port.



#12 Asmusr ONLINE  

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Posted Fri Jun 1, 2018 10:47 AM

It is rather heavy, as it's really in a small suitcase rather than a briefcase, as I just went out in the garage and looked at it.

 

:D



#13 iKarith OFFLINE  

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Posted Sun Jun 10, 2018 9:29 AM

I've wondered about the problem myself.  I don't necessarily need to use the old EPROM chips, and actually I don't have an EPROM eraser either and would want one if I were going to do that.  What I'd like though are some EEPROMs that work with modern programmers and replace the old EPROMs when you're done.  Dunno if these exist.  Probably via adapters.



#14 arcadeshopper OFFLINE  

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Posted Sun Jun 10, 2018 5:47 PM

I have burners eproms and adapters..

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