22 Apr
2016
22 Apr
'16
11:56 p.m.
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] 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:
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).
[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.
...