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DaveG

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Getting a printers status if there is no windows print driver

I want to be able to get the status from a printer connected to LPT1,LPT2 etc. The printer has no windows print driver installed, its data is sent via a text file opened as LPT1 etc. Any solutions?
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bsys

I guess that this is the same question as I asked before (a couple of days ago).
So the value for this question is 200 + 230 points (isn't that worth the answer??).
(FOR WHAT KIND OF APPLICATION THAT)
Can this software be used for COM ports also???
What delphi and windows version(s) do you need to support?

Regards,

Erik.
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bsys

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Here it is DaveG,I am using this in my POS program:

function TPrinterStatusForm.CheckCOM(Printer: Word): Word;
var
   PS: Word; {PS = Printer Status}
begin
     asm
       mov dx,Printer {COM, starts from 0}
       mov ax,300h
       int 14h
       and ax, 127
       mov PS,ax
     end;
     Result := PS;
end;

function TPrinterStatusForm.CheckLPT(Printer: Word): Word;
var
   PS: Byte; {PS = Printer Status}
begin
     asm
       mov dx,Printer {LPT}
       mov ah,02h {Status request}
       int 17h
       mov PS,ah
     end;
     Result := PS;
end;

And this works!!!
This is the routine I worked out myself from investigation- it is more or less the same:

function PrinterStatus(OutFile: Word) : byte;
var
  PrinterPort: Word;

  function GetStatus : byte;
  asm
     mov AH,$02 {get printer status}
     mov DX, PrinterPort   {lpt1=0, lpt2=1}
     Int $17   {get printer status}
     mov AL, AH
  end;
begin
  PrinterPort := OutFile;
  Result := GetStatus;
end;


The bits returned should correspond as follows

7 6 5 4 3 2 1 0   bit value
-----------------------------
1                   printer not busy
0                   printer busy
  1                 printer acknowledgment
    1               out of paper
      1             printer selected
        1           i/o error
          ? ?       unused
              1     timeout

This code works too....
I withdraw this question...
Ok, what do you want then?????????