VTL/Dutchess logic

[Chuck Guzis]

On 10 Oct 2010 at 16:03, Sridhar Ayengar wrote:

> Eric Smith wrote:
> > I'm not sure about VTL, but Dutchess was a specific generation of
> > bipolar gate array, containing up to 134 gates. It was basically
> > compatible with normal 5V TTL.
> 
> IBM *does* tend to do things differently, but they *do* document the
> hell out of everything.  The trick is finding the documentation, and
> sometimes it can cost a goodly chunk of change.

I seem to recall that "VTL" is an acronym for "variable threshold 
logic" and dates back at least to the 1960s.

--Chuck