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Re: Accumulator naming

From Lars Brinkhoff <lars.spam@nocrew.org>
Newsgroups alt.sys.pdp10
Subject Re: Accumulator naming
Organization nocrew
References <87wlulwflh.fsf@atr2.ath.cx> <mdd33x9cbvq.fsf@panix5.panix.com> <87se579i01.fsf@atr2.ath.cx> <mddqzklxxa5.fsf_-_@panix5.panix.com> <87zez8pkku.fsf@atr2.ath.cx>
Date 2026-07-31 13:35 +0000
Message-ID <7w4ihfjn7v.fsf@junk.nocrew.org> (permalink)

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jayjwa wrote:
> often do as follows (code from an ITS program):
>
> A=1
> B=2
> T=10
> TT=11
> Q=16
> P=17

This is my ITS program written recently, so don't put too my stock in
it.  But in my experience this is a common idiom at both MIT and SAIL.
The first few accumulators are named A, B, C, D, etc.  There are often
one or two consecutive temporaries T and TT.  The push-down list pointer
is often called P and is often 17.

The TENEX monitor, on the other hand, mostly uses the numeric accumulator
address.

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Thread

Fizz Buzz jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-07-23 17:39 -0400
  Re: Fizz Buzz Rich Alderson <news@alderson.users.panix.com> - 2026-07-23 23:19 -0400
    Re: Fizz Buzz jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-07-25 12:00 -0400
      Re: Fizz Buzz Rich Alderson <news@alderson.users.panix.com> - 2026-07-25 18:05 -0400
        Re: Fizz Buzz jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-07-26 11:12 -0400
      Accumulator naming Rich Alderson <news@alderson.users.panix.com> - 2026-07-29 18:10 -0400
        Re: Accumulator naming scott@slp53.sl.home (Scott Lurndal) - 2026-07-30 15:14 +0000
          Re: old architectures, was Accumulator naming John Levine <johnl@taugh.com> - 2026-07-30 20:40 +0000
          Re: Accumulator naming Rich Alderson <news@alderson.users.panix.com> - 2026-07-30 18:41 -0400
        Re: Accumulator naming jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-07-30 11:24 -0400
          Re: Accumulator naming scott@slp53.sl.home (Scott Lurndal) - 2026-07-30 16:03 +0000
          Re: Accumulator naming Rich Alderson <news@alderson.users.panix.com> - 2026-07-30 18:56 -0400
            Re: Accumulator naming cross@spitfire.i.gajendra.net (Dan Cross) - 2026-07-30 23:48 +0000
              Re: Accumulator naming John Levine <johnl@taugh.com> - 2026-07-31 01:31 +0000
                Re: Accumulator naming cross@spitfire.i.gajendra.net (Dan Cross) - 2026-07-31 02:52 +0000
                Re: Accumulator naming John Levine <johnl@taugh.com> - 2026-07-31 03:36 +0000
                Re: Accumulator naming Lars Brinkhoff <lars.spam@nocrew.org> - 2026-07-31 13:40 +0000
          Re: Accumulator naming Lars Brinkhoff <lars.spam@nocrew.org> - 2026-07-31 13:35 +0000
          the Ten Heavenly Stems (was Re: Accumulator naming) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-11 16:07 -0300
            Re: the Ten Heavenly Stems (was Re: Accumulator naming) Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-09-14 01:12 +0800
              Re: the Ten Heavenly Stems (was Re: Accumulator naming) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-14 14:40 -0300
                Re: the Ten Heavenly Stems (was Re: Accumulator naming) scott@slp53.sl.home (Scott Lurndal) - 2026-09-14 18:09 +0000
                Re: the Ten Heavenly Stems (was Re: Accumulator naming) quadibloc@invalid.com (John Savard) - 2026-10-26 03:00 +0000
  Re: Fizz Buzz "Kerr-Mudd, John" <admin@127.0.0.1> - 2026-08-21 13:27 +0100

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