29 Jul
2004
29 Jul
'04
8:19 a.m.
At 04:49 AM 7/29/04 -0700, you wrote:
On Wed, 28 Jul 2004, Marvin Johnston wrote:
The HP 9826 and 9836 had a battery backed RTC as part of the battery
backup/power fail option but I'm not sure of the date.
Hmm. Come to think of it, the HP-01 would probably count too.
Joe
Assuming that you are not talking about S-100
clock/calendar cards, the
Lobo Drives Max-80 had a built in clock.
I'm thinking farther back. Was there any mini or mainframe that had a
real-time clock built in or as an add-on option?
It's come up in some litigation. The actual issue at hand is that someone
was able to overturn a patent by claiming the IBM 650 had a real-time
clock built in. They "proved" this by submitting as evidence a printout
that had the date printed on it(!) I've checked the IBM 650 Manual of
Operation and it makes no mention whatsoever of a real-time clock. I
pretty much figured it wouldn't but I of course had to do due diligence.
But it made me wonder: what was the first computer to have a built-in
real-time clock?
--
Sellam Ismail Vintage Computer
Festival
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