29 Jun
2007
29 Jun
'07
2:06 a.m.
On Fri, 29 Jun 2007, Sridhar Ayengar wrote:
Brent Hilpert wrote:
And don't forget the LGP-30 (450 built in total, 45 built in Germany) and
compatibles (LGP-21, ...). Its word size is officially 32 bits, with only
31 bits usable (only the accumulator can hold all 32 bits, once stored on
the drum the LSB is forced to zero). So I call it a 31-1/2 bit machine.
And its design is marvelous, a CPU with all four basic arithmetic
functions (fixed point) that contains only 15 flip-flops.
Christian
Some other oddball values from that era:
- BINAC: 31 bits
I don't know if you can call 31-bit "oddball". IBM literally made
thousands
upon thousands.