3 ms·
Yeah... I remember designing these into circuit boards. They were much cheaper than EPROMs, so we did development with EPROMs and production with PROMs. And t
by laughing_man 3mo ago
Yeah... I remember designing these into circuit boards. They were much cheaper than EPROMs, so we did development with EPROMs and production with PROMs.
And then we desoldered and replaced all the PROMs when we found a problem.
- HeyLaughingBoy 2mo agoI don't miss those days. Constantly having chips in the eraser while you debugged the running version on the board and then finally programming an OTP (One-Time Programmable) device when you were ready to ship. I remember Parallax had some development devices that were a battery-backed static RAM with a cable that plugged into an EPROM socket. Faster to program and no eraser needed. Still, when cheap Flash came along in the mid-90's, it was a godsend.
- laughing_man 2mo agoThere was much celebration where I worked when the engineering manager approved EEPROMs. Not only did we put the eraser into storage, but they had the same footprint as the PROMs.