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llanos

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send and recieve info over a com port

I am looking for C++ (or dos)source code to send and receive info over a com port. How do I acces and turn on the com port and set the baud rate? Specifically on an HP200lx palmtop computer. I am trying to download information to the palmtop, the program is very low level and the dos interupt is not working. It is intended for a CMT datalogger but I am trying to adapt it to the HP, and it needs the COM port address.

Thanks,
Antonio Llanos  
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viktornet
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I'm not sure if this is what you are looking for but still....i hope it's a bit helpful
To read a port...
//This is assembler for Delphi
function ReadPortB( wPort : Word ) : Byte;
begin
  asm
    mov dx, wPort
    in al, dx
    mov result, al
   end;
end;
//To write to a Port
//This one is assembler for Delphi too..I mean the function is implemented with Delphi code
procedure WritePortB( wPort : Word; bValue : Byte );
begin
  asm
    mov dx, wPort
    mov al, bValue
    out dx, al
  end;
end;

Hope this helps ;-)

Regards,
Viktor Ivanov
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ZifNab
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llanos

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Thanks, I will check the URLs, I am really looking for something in C++ but that was my
mistake for posting on the Delphi area, I am new at this.