In <499329a7.4050...@valley.net>, on 02/11/2009
at 02:40 PM, Gerhard Postpischil <gerh...@valley.net> said:
>It depends on your definition of mainframe and compatible. The CDC 1604
>was an IBM 7094 look-alike,
You know better than that.
>differing primarily in
>using 1's complement arithmetic rather than 2's complement (sic)
Different instruction set, different number of index registers, different
word size, unable to combine index and indirect address, two instructions
per word, different interrupt and I/O system.
>using 1's complement arithmetic rather than 2's complement (patent
>issues?)
Inheritance from UNIVAC. But the 7094 used sign-magnitude.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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