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- TPSPOOL - Simple Print Spooler written in Turbo Pascal 4.0
-
- Released to the Public Domain AS IS!
-
- Written on or about 12/5/87
-
- VERSION 0.8!!! You get what you pay for.
-
- Uses TurboPower's Turbo Professional 4.0.
-
- This program captures printer output and saves it in a file. The printer
- output is captured by trapping the BIOS interrupt 17h and hijacking the
- characters.
-
- If you do not specify a number on the command line, TPSPOOL will use a large
- buffer. The buffer should be large enough to store the most characters that
- will be written at once. Future versions may not impose these requirements.
- In practice, I believe 16K, 32K, or the default of about 64K should work in
- most cases. The next version will use EMS for the big buffers, freeing
- valuable main RAM.
-
- In keeping with the Turbo Pascal tradition, Hex numbers may be passed on the
- command line by preceeding them with a $.
-
- The program will display some text, then terminate and stay resident. To
- activate, hit Alt-Tab (Alt key and Tab key at the same time). This "hot key"
- toggles the spooler on and off. When the spooler is off (the default), hitting
- Alt-Tab will beep and turn it on. When the spooler is already on, typing
- Alt-Tab will disable the spooler and dump the buffers to the spool file.
-
- All printer output is spooled (stored) in the disk file SPOOL01.TMP. If a
- file by this name exists, it is appended, if not, it is created. Future
- versions will allow other file names.
-
- Some examples of command line options:
-
- TPSPOOL<cr>
- This would use the default (biggest possible) buffer size.
-
- TPSPOOL $4000
- This would use a 16K buffer
-
- TPSPOOL $8000
- This would use a 32K buffer
-
- TPSPOOL 1024
- This would use a 1K buffer. This is probably too small unless you can
- guarentee that only Int 17h will be used to send output to the printer.
- See technical notes.
-
-
- TECHNICAL NOTES
-
- The most common problem experienced with this program is running
- it but forgetting to enable the spooler by pressing Alt-Tab. This will
- cause output to go to a printer if one is attached just like normal. If a
- printer isn't attached, YOU MUST ENABLE THE SPOOLER BEFORE TRYING TO PRINT.
-
- If a single write to the PRN device via a DOS Write Handle or Device call is
- larger than the specified buffer size, this program will hang. This is why
- the default is almost a full 64K. In reality, most programs send small chunks
- of 1K or less to the PRN device. If the program uses Int 17h directly (like
- most Word Processors), any buffer size of 1K or more will work safely. I
- recommend 4-16K if memory is tight, or 16-64K if it's not.