Prior to MPE/XL (later called MPE/iX) being released, MPE and its utilities
was written in SPL. Think that some of the very low-level stuff might have
been written in assembler/machine code. I would assume that CSY would only
rewrite the code that they had to. I'm not 100% sure but I think that some
of it is still in SPL(ash!).

As they say, "If it aint broke, don't fix it".

-----Original Message-----
From: Wayne R. Boyer [mailto:[log in to unmask]]
Sent: 30 November 2001 13:30
To: [log in to unmask]
Subject: Re: IBM as an option - IA-64 vs. PA-RISC


In a message dated 11/29/01 4:33:17 PM Pacific Standard Time,
[log in to unmask] writes:


> the millions of lines of hardware dependent MPE operating system source
code
> is the problem.
>

Does anyone really have an understanding of what language(s) the MPE source
code is written in?  Assuming something such as 'C' then with an IA-64 'C'
compiler, the source code would compile fairly well.  A lot of what we think
of as MPE are just straightforward utilities that call intrinsics that deal
with more hardware oriented issues.  How hard could it be to have programs
like FCOPY, DBUTIL, FTP, FORMSPEC, etc compile into IA-64 object code if you
have the appropriate IA-64 compiler for the language?

Wayne Boyer

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