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From: thorson@typhoon.atmos.colostate.edu (Bill Thorson)
Newsgroups: comp.sys.mac.programmer
Subject: For GURU'S Only
Message-ID: <4073@ccncsu.ColoState.EDU>
Date: 7 Feb 90 02:18:55 GMT
Sender: news@ccncsu.ColoState.EDU
Reply-To: thorson@typhoon.atmos.colostate.edu (Bill Thorson)
Organization: CSU Dept. of Atmospheric Science
Lines: 55


INTRODUCTION:
  This is a question for those C programming Macintosh Guru's out there.  I
have never used nor programmed on a Mac before but it looks like I will have
to do some next month and will only have one week to get it going.  This
is why I need all the knowlege I can get ahead of time.  I brought a MacSE
home to do some learning and testing on.

THE PROBLEM:
  I need to ingest satelite image on a Mac 2x (I think).  The images will
be sent, in groups of three, once an hour.  They will be sent at 56K baud
with no flow control.  The first byte represents the beginning of an image
and a 3+ seconds with no data represents the end of an image.  The images
will be fixed in size with a maximum of 4Meg/image but will be of three
different types.

  Ideally the Mac will be able to ingest these images without stoping
all other processes.  Since the Mac does not multitask this may not be
so easy.

  Realistically this Mac can be dedicated to ingest during the ~15 min
interval of the transfer and used for image analysis during the other
~45 minutes.  The analysis software will also be developed by yours
truely so I can make it stop when I want to.

THE QUESTIONS:

1) Can the Mac 2x 16mhz. keep up with this data rate?

2) Could it keep up while dumping to disk?  (8 meg RAM is available)

3) Can this be done in the background without going to an assembly 
   level?  I don't have to much time.

4) Would anyone have any small example of direct control of the
   serial port?  (in C preferably)

5) Is it true that Cherio's and the Bronco's are different because
   Cherio's belong in a bowl?

SEND RESPONCES TO:
#!/bin/sh
#-----------------------------------------------------------------------#
echo Bill Thorson                   thorson@typhoon.atmos.colostate.edu
echo Dept of Atmospheric Science    (303) 491-8339
echo Colorado State University
echo Ft. Collins,  CO  80523        Cray||Sun||Amiga -- I can't decide?
#-----------------------------------------------------------------------#
#!/bin/sh
#-----------------------------------------------------------------------#
echo Bill Thorson                   thorson@typhoon.atmos.colostate.edu
echo Dept of Atmospheric Science    (303) 491-8339
echo Colorado State University
echo Ft. Collins,  CO  80523        Cray||Sun||Amiga -- I can't decide?
#-----------------------------------------------------------------------#