Re: SFX Expander programming and VICE

From: Ethan Dicks <>
Date: Sun, 27 Nov 2011 19:08:07 -0500
Message-ID: <>
On Sat, Nov 26, 2011 at 4:41 PM, Marko Mäkelä <> wrote:
> Sorry, I could not resist the off-topic.
> As far as I understand, CP/M copied the file name conventions (except
> subdirectories and file versions) from Digital VAX/VMS, which was supposed
> to replace the archaic *nix systems.

CP/M predates VMS by several years.  Whatever it inherited from DEC
operating systems must have come from either RT-11 or TOPS-10 (I've
seen references to both, though what I remember from "back in the day"
it was RT-11).

> BTW, VMS distinguished binary and ASCII files, too.

Yes, and more.  VMS doesn't really have a "stream of bytes" mentality
that's common to UNIX and many personal computer operating systems.
It's record oriented.  Even plain text files are made of collections
of records of variable-length (not null-terminated or CRLF terminated
lines of bytes).  It was fun moving things to and from VMS as a result
(there were tools for encapsulating the record formats - in the same
tradition as Mac tools that preserved the resource forks).  Programs
written in C depend on a lot of invisible glue in the C run-time
libraries to simulate what is "normal" on a UNIX machine in terms of
file I/O.


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Received on 2011-11-28 01:00:07

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