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From: graham@ittral.UUCP (John Graham)
Newsgroups: net.micro.cbm
Subject: TYMAC Connection
Message-ID: <379@ittral.UUCP>
Date: Wed, 7-Mar-84 08:38:34 EST
Article-I.D.: ittral.379
Posted: Wed Mar  7 08:38:34 1984
Date-Received: Thu, 8-Mar-84 07:57:48 EST
Lines: 29

I purchased a Tymac "Connection" printer interface configured for
a Gemini 10X printer last year.  This interface ties into the C64
serial port on one end and to the Centronics port of the Gemini 10X
on the other end.  This interface is suppose to fully emulate a
1525 printer.  When operating this interface in the emulation
mode (entered by doing an OPEN 1,4,7) there is a way to pass
special Gemini 10X commands through the interface to the printer.
This is done by transmitting a double escape sequence [CHR$(27) CHR$(27)] 
followed by the printer feature command code [CHR$(command code)].  
For example, if I wanted to switch from normal to italics characters 
for print the following command sequence would work:

      OPEN 1,4,7

      PRINT#1,CHR$(27)CHR$(27CHR$(52)
     
      PRINT#1:CLOSE1

However, I have discovered that the "Connection" does not pass
all of the printer feature commands using this double escape
technique.  The commands for Emphasized mode, Double strike mode,
and Condensed mode are among the many which will not work.  I
have called Tymac, they are investigating the problem and will
get back with me.  Has anyone else experienced these problems?
Please advise.

John Graham
ITT Telecom B&CC
Raleigh, NC 27611