like a great deal of electronic tinkerers, [Andrew] has a great deal of ancient elements floating around his parts bin. His newest rediscovery in his cornucopia of elements are a few Intel MCS-48 microcontrollers, dating back to 1977. together with a few old EPROMs, [Andrew] chose it was worth getting these chips running again, if only for a historical curiosity.

[Andrew]’s had a few Intel 8035L microcontrollers on his hands, however this specific design of MCS-48 micros lacks any type of method to store code. This is where the EPROMs come in. With a contemporary EPROM programmer, [Andrew] was able to compose some code to the incredibly typical for their vintage 27256 EPROMs. Erasing them, though, does need a UV lamp.

With the ROM programmed as well as the chips connected, [Andrew] was able to make a easy blinking LED circuit. Sure, it’s the easiest thing you can finish with a microcontroller, however [Andrew]’s off to a excellent begin in his explorations of older hardware.