Err, they were really very different. The 709x had a 36-bit word, the 1604 a 48-bit word. The instructions sets were totally different. The 1604 packed two 24-bit instructions into each word. I learned computing on a CDC 3600, which was an upwardly compatible successor to the 1604.
"Gerhard Postpischil" <gerh...@valley.net> wrote in message news:<499329a7.4050...@valley.net>... > Ted MacNEIL wrote: > > Yes, they made processors; just not IBM-Compatable. > > 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?). > > > Gerhard Postpischil > Bradford, VT > > ---------------------------------------------------------------------- > 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 ---------------------------------------------------------------------- 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
