Parallel Port Problem - any ideas?

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oayran

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Parallel Port Problem

My current system is win2000 and i want to use visual c++ to get port usage.
The source code i had written is ;
unsigned short parlport=0x378;
void main()
{
int Data;
outp(parlport,0xff);
int status;
status=_inp(parlport);
cout<<"written="<<Data<<endl;
cout<<"read="<<status<<endl;
getch();
}
There is no error while linking but on executing level the error is;
First-chance exception in parallel_port.exe: 0xC0000096: Privileged Instruction.

What can i do ,if you have a mind please write me ,thanks.
 

From WinNT4 on no direct hardware access is allowed from user space programs. You need to install a kernel-space driver and ask the driver to do it for you.

An easy driver is giveio/portio; but I would recommend to use DLPortIO (do a google search for it). DLPortIO is supported on both the old Windows tree (95,98,ME) and the new NT-based kernel (NT4, 2k, XP)
 

I am using WINSYS driver for parallel port output, but there is serial number embeded in the driver. I would like to rewrite with driver studio. Does anybody has coding examples?

Thanks
 

u can find some drivers on the net
o nt systems you cannot access to parallel port without this driver
i write a dll file that you can use it on win all
if you call me i can give it to you
trabzone_net_team@yahoo.com
if you cannot use dll file in c++ then i can help you again
dont worry be happy man :lol:
 

may this will help a little
hxxp://wxw.beyondlogic.org/porttalk/porttalk.htm

and (NOT C)
hxxp://diskdude.cjb.net/

Hugo
 

Hi oayran,

Look also TVicPort.

Beuch
 

Sorry for language:

Try change :
outp(parlport,0xff);----> _outp(parlport,0xff);
 

Re: Parallel Port Problem

you can not use i/o command and memory access for different segments in the protected mode.

If you want to use this type command you must write driver program.
 

Hello, oayran

I think below can give you little helps.

Good luck.
:roll:
 

i juse DLPort its very good try in google u will find it
 

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