mlw@pyr.gatech.EDU (Michael Williams) (02/28/90)
I am having difficulty printing a large file from Turbo Pascal 4.0.
It seems that the CPU overwhelms the printer's buffer and causes an I/O
error. I have written some code to detect if the printer is OK, but it
doesn't work reliably. (It does work most of the time).
regs.ah := 2;
regs.dx := 0;
intr(23,regs);
if regs.ah = 144 then printer_ok := true;
I also thought about exec'ing the DOS print command to attempt to print in
the so-called "background". However, that involves calling a TSR from a
program, which is probably not a good idea.
Any suggestions???
--
Michael Williams
Georgia Institute of Technology, Atlanta Georgia, 30332
uucp: ...!{akgua,allegra,amd,hplabs,ihnp4,seismo,ut-ngp}!gatech!gitpyr!mlw
ARPA: mlw@pyr.gatech.edukemp@cs.umn.edu (Stuart R. Kemp) (03/01/90)
In article <9909@pyr.gatech.EDU> mlw@pyr.gatech.edu.gatech.edu (Michael Williams) writes: >I also thought about exec'ing the DOS print command to attempt to print in >the so-called "background". However, that involves calling a TSR from a >program, which is probably not a good idea. > >Any suggestions??? Instead of invoking DOS print from within the program, why not invoke it *before* you start the program, and then just submit the file to be printed? This can be done via an interrupt call. -Stuart Kemp
rb@ac.dal.ca (03/01/90)
In article <9909@pyr.gatech.EDU>, mlw@pyr.gatech.EDU (Michael Williams) writes: >... > I also thought about exec'ing the DOS print command to attempt to print in > the so-called "background". However, that involves calling a TSR from a > program, which is probably not a good idea. > > Any suggestions??? It is a good idea to always put 'PRINT /d:lpt1' in your autoexec.bat. Then it will always be loaded, and there will be no problem EXECing it from a TP program. If it is not loaded already, it will load itself below the calling program, and then you will have problems. ------------------------------------------------------------------------------- Rick Ballard Bitnet : RB@AC.DAL.CA Medical Information Services Dalhousie University Halifax, Nova Scotia
ts@uwasa.fi (Timo Salmi LASK) (03/01/90)
In article <9909@pyr.gatech.EDU> mlw@pyr.gatech.edu.gatech.edu (Michael Williams) writes: >I am having difficulty printing a large file from Turbo Pascal 4.0. >It seems that the CPU overwhelms the printer's buffer and causes an I/O >error. I have written some code to detect if the printer is OK, but it >doesn't work reliably. (It does work most of the time). I cannot guarantee that it works any better, but you could try PRTONLFN (get the online status of a printer) in TSUNTC.TPU in TSPAS18.ARC that was announced very recently in this newsgroup for anonymous ftp from chyde.uwasa.fi directory /pc/ts. ................................................................... Prof. Timo Salmi (Moderating at anon. ftp site 128.214.12.3) School of Business Studies, University of Vaasa, SF-65101, Finland Internet: ts@chyde.uwasa.fi Funet: gado::salmi Bitnet: salmi@finfun