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Beyond Logic Port Talk I/O Port Driver
http://www.beyondlogic.org
The PortTalk driver combined with allowIO.exe, grants certain programs
exclusive access to IO Ports on a Windows NT/2000/XP system.
Porttalk Driver Installation.
_____________________________
Copy porttalk.sys to winnt/system32/drivers or
(Windows/system32/drivers on XP) and then double click porttalk.reg
to enter the required keys into your registry. This will load the
driver automatically at next reboot.
For the more power hungry users, try the Windows NT/2000/XP driver
install utility at http://www.beyondlogic.org/dddtools/dddtools.htm
This tool can be used to install, start, stop and remove the driver
at run time without needing to reboot your machine.
Allowio - Grants programs access to IO Ports.
_____________________________________________
Usage : AllowIO <executable.exe> <Hex Addresse(s)> <Switches>
eg. Using allowio to grant access to IO ports 0x42, 0x43 and 0x61
C:\porttalk\AllowIO>allowio 0x42 0x43 0x61 beep.exe
Beyond Logic AllowIO.EXE
Address 0x042 (IOPM Offset 0x08) has been granted access.
Address 0x043 (IOPM Offset 0x08) has been granted access.
Address 0x061 (IOPM Offset 0x0C) has been granted access.
Executing beep.exe with a ProcessID of 1096
PortTalk Device Driver has set IOPM for ProcessID 1096.
This is more secure than allowing all programs and processes access
to all IO ports.
If you don't know what addresses a certain program uses, you can
grant access to all ports.
C:\porttalk>allowio beep /a
BeyondLogic AllowIO
Granting exclusive access to all I/O Ports
Executing beep with a ProcessID of 524
PortTalk Device Driver has set IOPM for ProcessID 524.
This is less secure. For example the program can talk to COM1
and lock up your mouse.
Source Code Included
____________________
This driver demonstrates the use of the following undocumented
windows NT calls,
PsLookupProcessByProcessId()
Ke386SetIoAccessMap();
Ke386QueryIoAccessMap();
Ke386IoSetAccessProcess();
Craig Peacock
6th September 2001
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