Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss

Computer clock speed up EC

4 views
Skip to first unread message

Lew Pitcher

unread,
May 6, 2023, 1:10:42 PM5/6/23
to
Long ago, I was told (or I read) about an early business computer
(I'm guessing circa 1960) that the manufacturer sold in two
different clock speeds. If you bought the "slower" system, you
could pay a licence fee and have a CSR come to /remove/ a component
that /limited/ the CPU speed.

Does any one else know of the details of this? Was it a rumour,
or did it actually happen?

--
Lew Pitcher
"In Skills We Trust"

Peter Flass

unread,
May 6, 2023, 2:27:00 PM5/6/23
to
It was fairly common. I think the IBM 1130 worked this way. Smart customers
might remove the jumper, and replace it before scheduled maintenance.

--
Pete
0 new messages