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From: culmer@eniac.seas.upenn.edu (Charles Culmer)
Newsgroups: comp.sys.apollo
Subject: Parallel port drives user nuts (repeat)
Message-ID: <8955@netnews.upenn.edu>
Date: 20 Mar 89 13:39:02 GMT
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Reply-To: culmer@eniac.seas.upenn.edu (Charles Culmer)
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[This is a repeat, condensed version of an earlier posting.  The first
one came back to me with a mail delivery error.]

I'm trying to run the simple parallel I/O program given in the example
directory.  It doesn't run--

     ios_$open gives "device is read only" error.
     spe_$pio_set_mode gives "option is not initialized" error.

Apparently, there are some SPE system calls that aren't covered in the
manual "Installing and Programming the DOMAIN Series 3000 SPE Option".
I don't see them in any of the include or help files.  (I have ordered
the system call manuals.)

Can someone please help me out with these questions--

(1)  Is there a system call spe_$pio_init?  Parameters and types?

(2)  Do I need any other system calls to make this I/O program work?

(3)  Will I have any trouble sending every (char) i for 0 <= i <= 255?
     I think my serial port is trapping some control characters.

(I'm using a Domain 3000, monochrome 1280 x 1024, version 9.7.)

Thanks in advance.

Charles W. Culmer
culmer@eniac.seas.upenn.edu       Truth, justice, and the American way