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- LPT2DSK - Capture printer output to disk file.
- Version 1.0
- October 3, 1986
- (c) Copyright by George G. Bouche
-
- This program works by intercepting the printer bios interupt (17h) and capturing
- the would be printed data in a buffer which is later written to a disk file. By
- capturing at the bios level, all dos printing (file redirection, Ctl-PrtSc, LPT?,
- PRN, ...) and programs which call the bios directly (BASIC, Shft-PrtSc) are
- handled. Capturing is for a specific printer (LPT1, LPT2 or LPT3) and output
- to the other two printers is passed thru to the original INT17 interupt address.
-
- Usage:
-
- LPT2DSK [p] [nnK] [F=[d:][\path]filename[.ext]]
-
- p=1, 2 or 3 printer number for LPT1, LPT2, or LPT3
- Default=1 LPT1
-
- nn=1 to 64 the amount of memory (in multiples of 1024 bytes) to
- allocate to the printer buffer. The K is required.
- Default=64K
-
- filename any valid dos filename (can be a device) with
- optional drive, path and/or extension. The F=
- is required.
- Default=LPT2DSK.p where p=printer number as above
- on the current drive, current directory.
-
- Requirements:
- - Dos 2.0 or later.
- - The parameters can be in any sequence but must be delimited by space(s).
- - Any or all parameters can be ommitted.
- - The environment must have an entry for locating COMMAND.COM (COMSPEC= )
- and COMMAND.COM must be available as it will be loaded.
- - LPT2DSK.EXE needs 9120 bytes + XXXX bytes for the resident portion of
- COMMAND.COM(for dos 3.1 this is 3200) + buffer size.
- - Multiple printers can be captured - just run the program again for the
- other printer. Remember, last one started is the first one to exit from.
- - Dos redirections of the printer (i.e. to COM?) are not detected and
- no data will reach the buffer.
- - The printer port hardware need not be present to capture data. The printer
- status of the captured printer is returned as ready/not busy unless the
- buffer has filled.
-
-
-
- Examples:
-
- LPT2DSK 2 32K F=CAPTURE.DAT
- capture LPT2 and reserve a 32k buffer. a secondary
- level of command.com is loaded. interupt 17h is
- replaced; no hardware or dos interupts are disturbed.
-
- ... run the programs that print
- and/or hit shift-print-screen
- and/or hit control-print-screen
- printing to LPT1 or LPT3 goes on un-affected
- if the buffer gets full, dos returns an
- "Not ready error writing device LPT2
- Abort, Retry, or Ignore"
- the only option is to abort.
-
- EXIT exit secondary command.com and end LPT2DSK
- the file CAPTURE.DAT is opened and data is written.
- if the file existed before, it is overwritten.
- if no data was printed, the file will not be opened.
- interupt 17h is restored to value before capture.
- all allocated memory is returned - nothing resident.
-
-
- LPT2DSK F=LPT1 3
- capture LPT3 and reserve a 64k buffer.
- the buffer will be written to printer 1 when done.
-
-
- Please direct any comments/suggestions/problems to:
-
- George G. Bouche
- P.O.Box 65111
- Lubbock, TX 79464