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Article #625622Re: PDP 11/40 system manual
From: Andreas Kohlbach
Date: Fri, 10 Aug 2018 20:17
Date: Fri, 10 Aug 2018 20:17
24 lines
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3076 bytes
On Thu, 9 Aug 2018 19:44:06 -0400, Michael Black wrote: > > On Thu, 9 Aug 2018, Elliott Roper wrote: > >> I guess everybody's idea of elegance is skewed by the first machine you >> really really loved. >> > I think that's true. I started with the 6502 and when I started > looking at 8080 code, it looked "odd". Just different from what I was > used to. Same here. Starting on the 6502 (6510 in a Commodore 64) and only recently had a look into the "Z80 Bible". It's all reversed what you had at the ",". Then you had no STA on the Z80, all was done via LD. You just reversed what was before or after the ",". Also interesting it had "primitives" like it was called later on the Intel 8086. Like LDIR: you put your search string in one register, the number of loops into another and let the magic happen. Of course to pair two 8bit registers into one 16bit register was convenient. -- Andreas My random toughts and comments https://news-commentaries.blogspot.com/
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From: Andreas Kohlbach <a...@spamfence.net>
Newsgroups: alt.folklore.computers
Subject: Re: PDP 11/40 system manual
Date: Fri, 10 Aug 2018 16:17:47 -0400
Organization: https://news-commentaries.blogspot.com/
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