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pool

Joined: 08 Jan 2007
Posts: 97

pool 08 Apr 2008, 06:44

Last edited by pool on 17 Mar 2013, 11:44; edited 1 time in total

08 Apr 2008, 06:44

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 08 Apr 2008, 08:23

if you mean direct port I/O, then no, you don't do this in windows.

08 Apr 2008, 08:23

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20430
Location: In your JS exploiting you and your system

revolution 08 Apr 2008, 08:37

There are a few drivers and bit of code around this board for directly accessing I/O. My favourite is UserPort which I have posted here before, search for it on here, or you can also google for it.

Of course, these things are all use at your own risk, since Windows and direct port I/O are not really the most compatible things to play with.

Edit: I found my original post:

http://board.flatassembler.net/topic.php?p=17732#17732

08 Apr 2008, 08:37

bitRAKE

Joined: 21 Jul 2003
Posts: 4061
Location: vpcmpistri

bitRAKE 08 Apr 2008, 09:32

vid wrote:

if you mean direct port I/O, then no, you don't do this in windows.

Of course, you mean it isn't done from Usermode (ring3).

Lots of info and source code for various versions of Windows:
http://www.lvr.com/parport.htm

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08 Apr 2008, 09:32

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20430
Location: In your JS exploiting you and your system

revolution 08 Apr 2008, 11:45

bitRAKE wrote:

Of course, you mean it isn't done from Usermode (ring3).

That is why I liked UserPort, it has two main features features: 1) allows direct access from ring3 without OS overhead and 2) can be set on a process-by-process basis and/or global allow/restrict by individual port numbers. It has an okay UI also.

08 Apr 2008, 11:45

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 08 Apr 2008, 12:28

what's the point of doing port I/O from ring3 ?

08 Apr 2008, 12:28

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20430
Location: In your JS exploiting you and your system

revolution 08 Apr 2008, 13:08

vid wrote:

what's the point of doing port I/O from ring3 ?

I use it with my JTAG programmer (on the parallel port), without the OS overhead it is 10+ times faster.

08 Apr 2008, 13:08

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