There was a 29G01 offered for a short time. Worth several times their weight in gold.
-- Will On Fri, Apr 22, 2016 at 8:15 PM, Eric Smith <space...@gmail.com> wrote: > On Thu, Apr 21, 2016 at 12:07 AM, Raymond Wiker <rwi...@gmail.com> wrote: >> I was a bit surprised to see that it used 2901 with a date code of 1985 - >> the 2901 was introduced 10 years before. > > The 2901 was the workhorse bit-slice data path chip for many years. > The A, B, and C suffix parts were progressively faster variants > introduced later. Eventually there were CMOS versions, and 16-bit-wide > versions. While AMD introduced the 2903 and 29203 as functionally > improved (but not directly compatible) 4-bit parts, they weren't > nearly as widely used as the 2901. > > Most other bit-slice parts can be considered "also-ran" at best, with > the Intel 3001 and 3002 probably being the next most successful. MMI > tried to beat AMD to market with the 5701/6701, which was very similar > to (but not compatible with) the 2901, but they were late to market > and AMD won. > > Motorola offered the MC10800 ECL bit slice series, which were > significantly faster at introduction than the contemporary Am2900 > parts, but AMD kept introducing faster 2901s. Some later 2901 > variants from AMD and National Semiconductor actually used ECL > internally, but had normal TTL I/O, but the CMOS that followed were > even faster than those.