Message-ID: <114@wuibc.UUCP>
Date: Fri, 25-Jan-85 15:30:21 EST
Article-I.D.: wuibc.114
Posted: Fri Jan 25 15:30:21 1985
Date-Received: Sun, 27-Jan-85 06:47:27 EST
Distribution: net
Organization: Washington U. in St. Louis, Institute for Biomedical Computing
Lines: 58

[]
A friend of mine has posed a question concerning CP/M which
is beyond my competence, so I'm hoping someone out there can
provide an answer.  The problem runs as follows:

He has a system consisting of an Apple //e, an Advanced Logic
Systems CP/M Card, and an Epson RX-80 printer (the printer
interface card is, I believe, a standard Apple Centronics card).
The version of CP/M being used is 3.01B1.  Whenever he attempts
to get a hardcopy of the file, the text always comes out double
spaced on the printer.  I came up with a band-aid solution to this
by writing a short Applesoft Basic program which set the printer
default line spacing to half normal.

The question we're trying to answer is this:
A) Are there any system parameters or switches inside the CP/M
   operating system which can be changed to cure this double spacing
   problem?  Apparently CP/M is sending a line feed with each carriage
   return, and the printer is happily appending a line feed after the
   carriage return also.  Anyway, we don't want to change the dip
   switches inside the Epson, since other software depends on them,
   so is there a way to stop CP/M from sending its own line feed?

B) If the answer to A) is no, then we would like to find out how to set
   up a 'PROFILE.SUB' file to perform the same actions as the Applesoft
   program.  Those actions are:
	--print a message to the screen to turn on the printer,
	  and then press a key
	--wait for a keypress
	--establish a data channel to the printer (PR#1 in Applesoft)
	--send the appropriate control characters to the printer
	  (ESC-@-CR-ESC-A-ACK-CR)
	--close the data channel (PR#0)

   I've speculated that the last 3 steps could be performed by:
	DEVICE CONOUT: = LPT
	TYPE SETUP.DAT
	DEVICE CONOUT: = CRT
   where SETUP.DAT contains the control characters for the printer;
   however, I haven't been able to create SETUP.DAT, since the only
   text editor he has is ED and I can't figure out how to enter control
   characters into a file using it.

Anyway, if anyone has any answers/solutions/clarifications concerning
the above questions, please send me mail at
	...ihnp4!wucs!wuibc!etm
And thanks in advance to anyone who does.

Ed Macke
Computer Systems Lab
Washington University
St. Louis, Mo.

-- 
Ed Macke
Computer Systems Lab
Washington University
St. Louis, Mo.