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Read/write IO ports on NT
- To: <cygwin at cygwin dot com>
- Subject: Read/write IO ports on NT
- From: "Clive Mayo" <cm at ttl-3d dot co dot uk>
- Date: 2001年7月24日 11:15:40 +0100
Hi
Trying to read and write directly at IO port on NT, using the following code
int main()
{
__asm("mov 1,ドル %al");
__asm("mov 0ドルx3f8, %dx");
__asm("out %al, %dx");
return 0;
}
also tried
int main()
{
_outp(0x378, 1);
return 0;
}
but get the following exception, Privileged instruction.
Any suggestions or pointers of how to code this.
Clive Mayo
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