spo0256

The GI SP0256 chip is an early 1980s bit of technology. It’s a 5V (to 7V) NMOS chip which is compatible enough with the 5V TTL circuity common in that era. 5V TTL disappeared for a while, then came back with the Atmel _28-based Arduino boards, many of which run at 5V. The SP0256 chip […]