Uh Oh! The dreaded ancient computer history thread has evolved again. And to think that I started it too.

Eric Bielefeld
Sr. z/OS Systems Programmer
Milwaukee Wisconsin
414-475-7434

----- Original Message ----- From: "Clark F Morris" <[EMAIL PROTECTED]>
Burroughs: B6500, B6700, B7500, B7800, etc. The tag bits constrained
how a word was interpreted for both data and instructions.

RCA: CDP, 601. The tag bits were under programmer control and had no
effect on the interpretation of words, other than triggering an
interrupt and being testable.

I remember the 301, 3301 and 501. What was the 601?

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