UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Studer / Revox etc BiPolar PROMS! Question and concerns!

TonyDuell · 25th May 2020, 10:52 pm

And a lot of manufacturers of bipolar PROMs, PALs, etc (at least for later devices) would NOT release the programming algorithm (other than under NDA) so you couldn't build your own programmer.

And Texas Instruments had their own versions of some of the EPROMs. What everybody else called a 2716 was a 2516 from TI. Their 2716 needed 3 supply voltages. They also had things like the 2564, close to a 2764 but with different enables (not just a pin swap). A lot of programmers can't handle the TI parts which can be a pain.

25th May 2020, 10:52 pm	#50
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,213	Re: Studer / Revox etc BiPolar PROMS! Question and concerns! And a lot of manufacturers of bipolar PROMs, PALs, etc (at least for later devices) would NOT release the programming algorithm (other than under NDA) so you couldn't build your own programmer. And Texas Instruments had their own versions of some of the EPROMs. What everybody else called a 2716 was a 2516 from TI. Their 2716 needed 3 supply voltages. They also had things like the 2564, close to a 2764 but with different enables (not just a pin swap). A lot of programmers can't handle the TI parts which can be a pain.