[fpc-devel] Re: fpc-devel Digest, Vol 94, Issue 14

[Mark Morgan Lloyd]

steve smithers wrote:

> These systems have had had 32 bit compilers since the mid 1960's, it's not
> rocket science, just computer science.  A version of C was implemented on 360
> machines at Bell Labs long before it became a portable system.  The architecture 
> produces problems, but these are surmountable.  I won't have answers to
> everything;  I don't know enough (actually hardly anything) about the internals
> of the FreePascal code generator.  I am confident enough in my abilities to
> know that these items are soluble;  After all VS/Pascal solved them;  GCC
> solved them (and there is a version of GCC available for 370 processors) etc

Although if I understand things correctly instruction and operand 
addresses were 24 bit until the mid 80s, at which they became 31 bit 
(2Gb per process). Various interesting stuff on porting GCC in 
http://mvs380.sourceforge.net/System380.txt

-- 
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]