Re: PALM challenge

From	Thomas Koenig <tkoenig@netcologne.de>
Newsgroups	comp.compilers
Subject	Re: PALM challenge
Date	2022-10-02 20:13 +0000
Organization	news.netcologne.de
Message-ID	<22-10-011@comp.compilers> (permalink)
References	<22-10-001@comp.compilers>

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Steve Lewis <lewissa78@gmail.com> schrieb:
> Lots of new CPUs, sure.
>
> But let's explore an old CPU: the 1975 PALM. ...

> [Architecture described here http://computermuseum.informatik.uni-stuttgart.de/dev/ibm_5110/technik/en/
> It doesn't look like it would be all that bad as a target for C although the code to handle the stack
> might be a bit tedious. -John]

Interesting having 16-bit integers but only an 8-bit ALU, where
a carry for addition is added to the upper bit, would need a few
instrucions for a 16-bit addtion.  It would be straightforward
to write out such an instruction sequence each time a 16-bit
addition was required, though.
[IBM programmed the PALM to simulate most of S/360 to run APL\360 and
the System/3 mini to run the BASIC interpreter, both I assume hand
coded in assembler.  It was a tour de force at the time.  I agree that
generating code for C doesn't look hard, just tedious. -John]

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PALM challenge Steve Lewis <lewissa78@gmail.com> - 2022-10-01 01:24 -0700
  Re: PALM challenge gah4 <gah4@u.washington.edu> - 2022-10-01 17:09 -0700
  Re: PALM challenge Thomas Koenig <tkoenig@netcologne.de> - 2022-10-02 20:13 +0000
    Re: PALM challenge gah4 <gah4@u.washington.edu> - 2022-10-03 04:37 -0700

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