25 Oct
2018
25 Oct
'18
11:49 a.m.
On 10/25/18 11:33 AM, Al Kossow via cctalk wrote:
On 10/25/18 10:45 AM, Chuck Guzis via cctalk wrote:
Dunno, the mind is foggy on this detail, since I never played with the
beast. But it seems to me that there was at least one "too slow" MPU
out there in production at some point.
--Chuck
Didn't at least one of the more popular MPU
designs employ a serial ALU?
TMS9900?
You've mentioned this a couple of times.
Are you confusing this with the serial CRU I/O scheme TI computers used?
I double-checked and the 960,980 and 990 minicomputers are all 16 bit parallel machines.
The 9980/1 and 9995 had an 8 bit memory bus but internally are 16.
I double-checked, and the TMS9900 has a 16 bit ALU (page 6 in
TMS_9900_Microprocessor_Data_Manual_May76.pdf on bitsavers)