Reader's Clinic - Changing from LPT1 to LPT2 in RBASIC [Revelation On-Line Wiki]

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====== Reader's Clinic - Changing from LPT1 to LPT2 in RBASIC=====

^Published By^Date^Version^Knowledge Level^Keywords^
|Sprezzatura Ltd|01 JUL 1990|1.15+|EXPERT|SETPTR, LPT1, LPT2|

Both Patrick Collins of Softsolve Computer Systems and Jonathan Bird of
Argyle Fabrics asked the same question recently - "How can one change from
LPT1 to LPT2 from within RBASIC?".

The solution to this is straightforward, and covered already (albeit
indirectly) in REVMEDIA 6:4. RevTech also referred me back to SETPTR.

As previously documented, the SETPTR routine redirects printer i/o to a
nominated file. To DOS, LPT1 and LPT2 are reserved filenames and to all
intents and purposes can be treated as files. Thus to change to LPT2 simply

   CALL SETPTR("LPT2" : CHAR(0),1)

and to change back to LPT1,

   CALL SETPTR("LPT1" : CHAR(0),1)


(Volume 2, Issue 3, Page 3)