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From: west@bnrmtv.UUCP (Andrew West)
Newsgroups: net.micro.mac
Subject: Arbitrary Serial Output
Message-ID: <821@bnrmtv.UUCP>
Date: Tue, 28-Oct-86 12:40:24 EST
Article-I.D.: bnrmtv.821
Posted: Tue Oct 28 12:40:24 1986
Date-Received: Wed, 29-Oct-86 09:08:31 EST
Distribution: net
Organization: Bell Northern Research, Mtn. View, CA
Lines: 35


I am planning to use the Macintosh serial port (i.e. modem) to send a
block of data to an asynch. interface which will read the data into a
small RAM.  I will be using some sort of standard start/stop, parity and
baud rate setup (I'll worry about the details later when I am actually
programing everything).  The RAM data will be used as an external routine
for an 8051H microcontroller (don't ask--it wasn't my choice).

I would like to set up a short file on the Mac with the program already in
binary (the routines are short enough that entering a few 1's and 0's is
not a big deal) and send the data to the RAM.  I would also like to use
an existing modem program or perhaps write a quick and dirty routine (at
the highest level possible; I'm not proficient in C but do have access to
MSBasic and MacPascal).

The problem I am having at the moment is that all my modem programs and
the poorly documented routine in the MSBasic manual are for sending ASCII
characters.  I need to be able to send arbitrary bytes, consisting of
whatever arrangement of 1's and 0's I need (i.e. if 10101010 were a JMP, I
need to download that exactly (along with the normal extra protocol
overhead which the Mac should add and the receiving Asycnh chip should
strip off), not the ASCII 1, ASCII 0, ASCII 1, etc. that most programs
send).

Can anyone offer a suggestion as to a existing program I might be able to
use, a short code segment that might accomplish this, or a reference that
might be helpful.  My primary responsiblity for this is the hardware so I
would prefer not to spend a lot of time with Inside Macintosh to figure
out a bunch of toolbox routines.

Thanks for any help or suggestions.


					Andy West
					...bnrmtv!west