Raymond Toy <email@example.com> wrote:
| Rob> How big is "gf256-multiply-table"?
| Of course, the old multiplication table. Forgot about the most
| obvious way of doing multiplication. :-)
Which reminds me of a piece of computer history trivia:
The IBM 1620 (which was used in an NMR Lab where I worked in college),
like the IBM 1410, had arbitrary-precision hardware arithmetic. Numbers
were literally strings of decimal digits. And the hardware "multiply"
in the 1620 (though not the 1410) *did* use a lookup table, which was
loaded into low core (yes, "core"!) at boot time.
One of the favorite practical jokes the old-timers would play on the
newbies was to alter a few of the entries in the multiply lookup table,
then walk away. A newbie would come in, see the machine unused, and --
wanting to quickly get a chance to run their program before the grad
students came back & kicked him off the machine -- would load & run
their programs WITHOUT REBOOTING FIRST... (Oops!)
Rob Warnock, 8L-855 firstname.lastname@example.org
Applied Networking http://reality.sgi.com/rpw3/
Silicon Graphics, Inc. Phone: 650-933-1673
2011 N. Shoreline Blvd. FAX: 650-964-0811
Mountain View, CA 94043 PP-ASEL-IA