2020-10-02 09:37 AM
Hi,
i know the world has advanced, everything Now is Arduino this, Arduino that...
BUT...
i feel curious about old technology... to learn about old technology.
for example the Fujitsu MBM2732A eprom, UV erasable. 25v programmable.
Newer/later versions were 21v programmable.
ST made a similar part M2732A
found datasheets for both Fujitsu and ST...
http://www.bitsavers.org/components/stMicroelectronics/_dataBooks/Memory_Products_Databook_Jun88.pdf
http://noel.feld.cvut.cz/hw/st/4737.pdf
http://search.datasheetcatalog.net/key/M2732A
But havent found the programming manual....
or a good source to learn about EPROMS. reverse eng. or something
the same stuff old engineers used to learn.
the forgoten art.
https://archive.org/search.php?query=eprom
= i need EPROM programers manual .pdf for Dummies. LOL Jajajajaja
2020-10-02 12:32 PM
2020-10-02 12:42 PM
I wouldn't paint yourself too deep into a corner, they behaved in quite similar ways.
This is back in the day of printed and typed documentation.
http://ww1.microchip.com/downloads/en/Appnotes/DOC0578.PDF
https://xtronics.com/wiki/How_EPROMS_Work.html#Programming_algorithms
Might try the patents
https://www.google.com/patents/sitemap/en/Sitemap/G11/G11C/G11C_16_438.html
2020-10-02 12:48 PM
SGS Thompson EPROM Programming
Programming signals described in here. They didn't provide huge essays on how to do this, or provide compilable C code, you were expected to be able to sequence pins on your micro-controller of choice, in assembler. You gated higher voltages to programming pin.
https://downloads.reactivemicro.com/Electronics/ROM/2764%20EPROM.pdf
http://www.protronix.co.za/images/info/M27C512.pdf