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. The TI SBP0400A and SBP0401A were I2L 4 bit slices. The 400 had an internal pipeline register while the 401 was designed for external pipelining. ALU operations took 240ns at 200mW. It had an 8 register bank besides the working register. All I know about these is what I read in "The Bipolar Micromputer Components Data Book", December 1977 edition. I have no idea if these chips were actually shipped or if they were used in any product. -- Jecel