Path: csiph.com!eternal-september.org!feeder.eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: Tim Rentsch
Newsgroups: comp.lang.c++
Subject: Re: What does the "L" mean
Date: Fri, 06 Dec 2019 22:20:54 -0800
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Vir Campestris writes:
> On 04/12/2019 09:20, T wrote:
>
>> 36 bit? My brain hurts
>
> I've used systems where the native word size is 16, 24, 32, 36 and 64
> bit. Other values are available :( [...]
>
> The one with 36 bits (DECSystem10) an address was the address of a
> word, and you couldn't point to a character inside the word.
The PDP-10 did have a format, and instructions that used that
format, to access any contiguous set of bits within a 36-bit
word. They were called, IIRC, byte pointers, and would serve
perfectly well as a representation for 'char *' and 'void *'.