On Tue, Mar 15, 2011 at 7:17 AM, Alexey Eromenko <[email protected]> wrote:
> Rumors say, that it is highly experimental, officially unsupported,
> and only works on Linux hosts.
>
> Since my printers are all USB now, I have no LPT devices left.

I´m not interested in printers but more in I/O (bidirectional) devices
that use the parport to transfer data, with propietary windows
drivers, using EPP mode, 378h...

Allowing apps exclusive access to the parallel port is possible in
Windows... see:

------
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.

Installing PortTalk V2.0
________________________

The PortTalk usermode programs now come with a self installer.
This is built into allowio.exe and ioexample.exe. When these
usermode programs are executed, a check is made if the PortTalk driver
is started. If the driver is not started it attempts to install the
driver and then start it.

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.

Craig Peacock
13th January 2002
-------------------------------

Perhaps it could be possible to use these drivers together with VBox
on Windows hosts?. The question is if VBox contains the required bits
for port virtualization...

FC

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