Quoted from G-P-E:...
And for really, really old stuff - nothing beats the old serial port controlled, 50# Data-I/O Model 29B. Still worked last time I used it... something like 20 years ago.
Mine is tied to a Compaq 486 that has DOS and Promlink and very little else (Windows 3.1). One never knows.... I just might need a 2708 or a TMS2716 for something, though getting hit by lightning is far more likely. It put Night Rider on a 2732 a couple months ago.