On 4/22/2016 11:56 PM, Brent Hilpert wrote:
-----Original Message----- From: cctalk
[mailto:[email protected]] On Behalf Of Jecel Assumpcao
Jr. Sent: Friday, April 22, 2016 10:54 PM To: General Discussion:
On-Topic and Off-Topic Posts Subject: bit slice chips (was Re:
Harris H800 Computer)
Eric Smith mentioned:
[2901 A, B, and C, CMOS versions] [2903 and 29203] [Intel 3001
and 3002] [MMI 5701/6701] [Motorola MC10800]
I'd add the Texas Instruments SN74S481, SN54LS481 and SN74LS481 TTL
4 bit slices. The Schottky version had a 90ns clock cycle and the
low power versions 120ns. These were 48 pins chips and didn't have
an internal register bank like the 2901. The idea was that you
implemented a memory to memory architecture like the TMS9900. ...
I'd say the 74181 (1970) deserves a mention here. Simpler (no
register component, ALU only) but it pretty much kicked off the start
of IC-level bit slicing.
Adding to Eric's mention of the PDP-6, the HP2116 (1966) did
board-level bit-slicing (CPU registers, ALU, datapaths on 4 identical
boards of 4 bits each).
The MC10181 (same thing at the 74181 except implemented in ECL) is used
by the DEC KL-10 in several places.
Rob.
