LPT Port Use?

Comments

• ASHLEY4

  April 2002

  : The 2nd to the 9th pin on the 25pin LPT port has 5v between each one and one of the ground pins : 16-25 if I turn them on. But how can I activate it in Pascal?
  :
  : In C I can use: outportb(PORT,val); Is there a similar function in Pascal?
  :
  
  Try
  
  port[0x378]:=$01;
  
  \|///
  @)
  ASHLEY4.
  
  
• ruangroj

  May 2002

  : : The 2nd to the 9th pin on the 25pin LPT port has 5v between each one and one of the ground pins : 16-25 if I turn them on. But how can I activate it in Pascal?
  : :
  : : In C I can use: outportb(PORT,val); Is there a similar function in Pascal?
  : :
  :
  : Try
  :
  : port[0x378]:=$01;
  :
  : \|///
  @)
  : ASHLEY4.
  
  
  ***********************
  ///Pascal
  1.Mem[seg:off]:=$10; //put data 1 byte to address[seg:off]
  2.v1:=MemW[seg:off]; //put data 2 bytes from address[seg:off] to v1
  3.v1:=MemL[seg:off]; //put data 4 bytes from address[seg:off] to v1
  4.port[No.]:=$10 //put data 1 byte to port number...
  5.portw[No.]:=$1234 //put data 2 bytes to port number...
  ///Delphi sample
  procedure setdsp(mode : word); assembler;
  asm
  mov ax, mode
  int 10h
  end;
  
  Ruangroj
  
  
  
  
  
  
  
• speedscoot

  May 2002

  Thanx, i'll try!!
  
• speedscoot

  May 2002

  I've got it working, but forgot to ask how to input data. The lpt port also has pins for paper feed and error... if i want do send data to the computer with them. Do i have to ground them, or put logic 1 (3.5volts) on them? Don't want to blow my motherboard!!!
  
• SniffeX

  October 2002

  : ///Delphi sample
  : procedure setdsp(mode : word); assembler;
  : asm
  : mov ax, mode
  : int 10h
  : end;
  :
  : Ruangroj
  :
  :this will crach the computer under w95 w98 and maybe not work under NT
  this for setting screen mode like
  setdsp($13); is mode 320x200x256 colours and its for real mode not protected mode or kind of .
  
  you have to be carefuly on sample you send because this one may
  cause several problems on someone computer.
  
  Just Dont try it.
  :
  :
  :
  :
  :
  
  
• iby

  October 2002

  : I've got it working, but forgot to ask how to input data. The lpt port also has pins for paper feed and error... if i want do send data to the computer with them. Do i have to ground them, or put logic 1 (3.5volts) on them? Don't want to blow my motherboard!!!
  :
  
  
  Reasonable concern... Buy extra LPT port or
  better USB>LPT convertor.
  
  Iby