18 Oct
2010
18 Oct
'10
4:27 a.m.
From: Jochen Kunz <jkunz at unixag-kl.fh-kl.de>
I was referring to a wartime machine, I think it was Z4 with external tape program. As far
I recall it can't do loops and uses relay logic. More of a programmable calculator
than a computer.
Any idea how often Z22 is actually powered up and run? I must read up on it.
Thanks for replying.
Roger Holmes.
I'm not counting the Zuse in Germany as its
not a stored program
machine, and anyway I'm not sure if it is a replica or the original.
What Zuse
you are refering to? There are "many".
The Z22 at the ZKM sholud be complete and and operable. (If the people
at the ZKM have not ruined the machine meanwhile.) It is tube based and
was build 1958. It is a stored program machine for sure. Main memory is
a drum with 8192 words. It is original and has been kept in working
condition most if its lifetime.