Apple II hardware design

From: William Donzelli <william_at_ans.net>
Date: Mon Jun 23 21:13:26 1997

> Ah - if you think of 74LS68x and 14L4's as "current" with the introduction
> of the Apple II, then that helps (to some extent) explain why you
> don't like Wozniak's designs. Neither of these devices were even
> gleams in anybody's eyes in 1977! The closest you'll come to programmable
> logic in 1977 are bipolar PROM's. (Which Woz was no stranger to -
> just take a look at the Disk ][ controller!)

Signetic (I think it was them) had some PAL like devices back in the
mid-1970s. I do not think they were as flexible as PALs, but they did
combine the best of the PROM and glue worlds for decoding schemes.

William Donzelli
william_at_ans.net
Received on Mon Jun 23 1997 - 21:13:26 BST