22 Feb
2007
22 Feb
'07
2:46 p.m.
well, the first real-time computer is the Whirlwind(MIT). A real-time
machine makes use of a real-time clock to provide deterministic
calculations. This was the precursor to the SAGE machine--also a
real-time system. I used to work for SEL which was heavily involved in
real-time systems, and which made one of the first 32bit real-time
machines in the 70's.
=Dan
[ My Corner of Cyberspace http://ragooman.home.comcast.net/ ]
Billy Pettit wrote:
Roger Holmes wrote:
I wonder which was the first computer with a real time clock, what
year and how
it was implemented. I imagine it was invented primarily for charging
for computer
time. I think the first machine I programmed, the IBM 7094 had one
because if
your job ran over its limit time (30 seconds IIRC), the job was
aborted. Unless that
was the operator looking at his wrist watch!
Roger Holmes
---------------------
The earliest I worked on was the CDC 1604, shipping in 1959. It used a 1ms
increment and a 48 bit count. Like you mention, it was used for job
control. But most of the early customers were military and used it for data
logging from various experiments. That's a nice way of saying they made
bombs and exploded them.
Billy