On Wed, 11 Feb 2009 14:40:23 -0500, Gerhard Postpischil wrote: > >It depends on your definition of mainframe and compatible. The >CDC 1604 was an IBM 7094 look-alike, differing primarily in >using 1's complement arithmetic rather than 2's complement >(patent issues?). > Just to clarify (you didn't say either way), the 7094 did not use 2's complement arithmetic.
I assumed 1's complement was motivated by the desire to overload boolean complement with arithmetic complement. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
