8 May
2010
8 May
'10
10:57 a.m.
On 8 May 2010 at 12:25, Jim Leonard wrote:
CDC 6000 PPU: 18-bit
Seymour Cray probably would have disagreed with you. I have *never*
seen them referred to as anything but 12-bit processors. I think the
long accumulator and associated instructions were added to the 160A
design to facilitate CPU access (CM addresses are 18 bit).
How about the IBM 1620? No accumulator; memory-to-memory; variable
word length (2-20,000 digits).
--Chuck