On 12 Sep 2006 19:04:24 -0700, in bit.listserv.ibm-main you wrote: >In <[EMAIL PROTECTED]>, on 09/11/2006 > at 02:36 PM, "Patrick O'Keefe" <[EMAIL PROTECTED]> said: > >>The B5500 had similar structure and set of capabilities. > >There were major changes in architecture from the B5x00 to the >B6x0/B7x0 line. > >>It also had another processig mode - a string processing mode - >>where storage WAS directly accessable. > >One of the security problems that the B6500 fixed. > >>That suggests that the underlying architecture was quite different >>than what was presented to the user. > >I'm not sure what you mean by the underlying architecture. What >Burroughs documented was the format of the various control words, data >words and instruction syllables, along with the register set. Stream >mode was part of that. > >>We never learned aythig about string-mode processing (which was most >>likely not accessable from ALGOL) > >It was accessible from Extended ALGOL. IIRC Extended Algol was used as the Burroughs equivalent of Assembler for that series.
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