29 Jun
2007
29 Jun
'07
11:24 a.m.
Christian Corti 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
Billy wrote:
Delightful machine wasn't it? To accomplish so much with so little logic.
Those were the days when an engineer would be consider a genius and could
get a big bonus for eliminating one flip-flop!
Billy