From Newsgroup: comp.os.msdos.programmer

I would like PDOS/86, a sort-of MSDOS clone, to have an
extension which is letting the OS know whether the file
being opened is being opened in text or binary mode.

Cygwin has an O_TEXT/O_BINARY extension to the
Unix open() basically doing the same thing.

The creat() call has 8 unused bits I could use:

http://www.ctyme.com/intr/rb-2778.htm

The open() call has a bit 3 in AL:

http://www.ctyme.com/intr/rb-2779.htm

which is reserved which I could use to indicate that
BX is populated with a fresh set of 16 bits, even
though I only need 1.

Any suggestions?

Thanks. Paul.
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From Newsgroup: comp.os.msdos.programmer

On Fri, 21 Oct 2022, muta...@gmail.com wrote:

I would like PDOS/86, a sort-of MSDOS clone, to have an
extension which is letting the OS know whether the file
being opened is being opened in text or binary mode.

Cygwin has an O_TEXT/O_BINARY extension to the
Unix open() basically doing the same thing.

I feel like this should be handled in the libc, for compatibility, as
existing MS-DOS compilers do (in exactly the same way you describe).

-uso.
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From Newsgroup: comp.os.msdos.programmer

On Saturday, October 22, 2022 at 1:43:20 PM UTC+8, Steve Nickolas wrote:

On Fri, 21 Oct 2022, muta...@gmail.com wrote:

I would like PDOS/86, a sort-of MSDOS clone, to have an
extension which is letting the OS know whether the file
being opened is being opened in text or binary mode.

Cygwin has an O_TEXT/O_BINARY extension to the
Unix open() basically doing the same thing.

I feel like this should be handled in the libc, for compatibility, as existing MS-DOS compilers do (in exactly the same way you describe).

I can still get the libc to generate a CRLF when writing to
the OS. But once the OS knows that this is a text file, it
can choose to convert the CRLF into LF if the OS/user wishes.

Wouldn't that be the ideal?

BFN. Paul.
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