Need to learn C, best books?
Dirk Koopman
djk at tobit.co.uk
Fri Oct 26 11:50:11 BST 2007
Jacqui caren wrote:
> On big old Cray's (char*) were word pointers with the "byte bits" (octal
> digit) rotated to the head of the pointer value. Dont ask why I asked
> someone once and my head hurt afterwards. :-)
>
They were at the end of a fashion for that sort of thing that started in
the 1960's and finally died out toward the end of the 70's. Machines
like ICL 1900 series had a similar system to address (6 bit) characters
as well.
What stopped this nonsense was the realisation that, actually,
processing text was at least as, then becoming more, important than
number crunching. So newer processor designs became directly character
addressable - although there was still some debate about what a
character was in terms of storage. And the stupid business with making
sure numbers were aligned on boundaries carried on for a loooooong time
after that (horrible, nasty 68K processors).
Dirk
More information about the london.pm
mailing list