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From: bobwo@hpcvra.cv.hp.com. (Bob Worsley)
Newsgroups: comp.sys.handhelds
Subject: Re: [HP48] ON-MTH
Message-ID: <25590114@hpcvra.cv.hp.com.>
Date: 4 Mar 91 19:10:26 GMT
References: <SEITZ.91Mar1094631@az3.informatik.uni-stuttgart.de>
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 15


> According to the manual, the key combination ON-MTH should result in a
> 'screendump' (same as PRLCD).
> BUT:
> This feature does not work, when called as the first action after pressing
> [ON] while output is directed to the serial port (F-33=0, F-34=1). It seems
> to me, that an arbitrary PRxxx from the PRINT-Menu is needed before ON-MTH
> does what it should do.


As the manual states (footnote on pg 605, under Printing the Display) the
serial port must be opened before using ON-MTH to print to the serial port.
When the 48 turns off the port is automatically closed, so you must open it
somehow.  OPENIO will do this without printing or as you noted the other print
commands will also do the trick.