| 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)