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Article #625541Re: PDP 11/40 system manual
From: Peter Flass
Date: Sat, 11 Aug 2018 11:34
Date: Sat, 11 Aug 2018 11:34
23 lines
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2688 bytes
Bob Eager <news...@eager.cx> wrote: > On Fri, 10 Aug 2018 15:01:06 -0400, Rich Alderson wrote: > >> I still think in EBCDIC, nearly 50 years later, rather than ASCII, which >> I sort of learned less than 40 years ago, and I still have a fondness >> for the 360 instruction architecture, but the orthogonality of the >> PDP-10 instruction set, the uniform use of bits 7-8 to indicate >> no-modification/immediate/memory/self on all the data movement >> instructions, the elegance of single instructions to conditionalize the >> execution path rather than a sequence in which you have to be careful of >> changes to the condition codes you're checking, even the word addressing >> rather than byte addressing, have forever spoiled me for lesser systems. > > I was going to mention the PDP-10, but forgot. I did quite a lot of > assembly language programming on one. > Yes, I loved the -10 too, although I didn't program it extensively. I was sorry when it was canceled, although I suspect it would have been difficult to expand the architecture to larger memory sizes. -- Pete
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