2708 Programming Algorithm?

Richard Erlacher wrote: > > It's been a long time, but since I just recently handled the old 8748 doc that > has the reference I thought I saw, it'll be cleared up soon. > > I just remember that all the 87xx parts, 8741, 8755, 8748/49, etc, were all > 5-volt parts. further, I'm not at all sure that the 8080 had below-ground > signal levels, since they were intended to be attached to bipolar parts, e.g. > 8212, etc, which would have been intolerant of that. What I've got in my lap > is the 8080A data, which may, actually be different, but IIRC, the 8080 needed > the negative bias supply so it could swing to ground and the +12 so it could > swing to a reasonable high level. My only contact with the 8080 was on boards > made by Intel, and, while I poked around with a 'scope and other gear from > time to time, I don't recall ever finding an address, data, or control signal > that wasn't TTL compatible.

But check the specs TTL compatible often is for 1 TTL S load for output lines max.