Article View: alt.sys.pdp8
Article #38PC incrementing
From: John Wilson
Date: Sun, 11 Oct 1992 20:09
Date: Sun, 11 Oct 1992 20:09
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I'm sure someone (cjl?) will know the answer to this nitpicky
question...
When an MRI occurs in the last word of a page (+177) and has bit
4 set ("this page" as opposed to page 0), is the datum accessed
on this page or the next one? That is to say, by the time the
high 5 bits of the PC have been prepended to the low 7 bits of
the instruction, has the PC been incremented yet?
I would just try it but my 8/e is in Boston...
Thanks, John
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Newsgroups: alt.sys.pdp8 Path: arc1-ca.pugleaf.net!sparky!uunet!destroyer!sol.ctr.columbia.edu!usc!rpi!jwilson From: jwilson@unix.cie.rpi.edu (John Wilson) Subject: PC incrementing Message-ID: <_byz88_@rpi.edu> Nntp-Posting-Host: unix.cie.rpi.edu Organization: CIE, Rensselaer Polytechnic Institute, Troy, NY Date: Sun, 11 Oct 1992 20:09:30 GMT Lines: 12