29 Jul
2014
29 Jul
'14
4:58 p.m.
On 07/29/2014 02:05 PM, Paul Koning wrote:
I wonder how the equivalent test on an IBM 1620 would
behave. No
length field there, just an end of operand marker, so you could make
numbers as big as can fit in memory (60k digits in a max
configuration).
I've never seen a 1623 expansion unit in the metal, so to speak--they
must have been very scarce indeed--all of the 1620s that I've run into
have been CADETs, though some of the front panels used on "The FORBIN
project" as props probably were Mod IIs or maybe even 1710s. Funny,
the movie itself that used old computer junk is itself an antique now.
Funny thing is that I can still remember many numeric opcodes for the
thing--and always start an instruction on an even-digit boundary...
My, how time flies.
--Chuck