Re: parallel port addresses

> i had written a driver uses inport() and outport() macros to write to
> LPT1

You cannot do this reliably, the port is owned by parport.sys, and you can only send requests to parport.sys

Otherwise, you will have races with parport.sys and thus major issues.

--
Maxim S. Shatskih
Windows DDK MVP

http://www.storagecraft.com

>port . What is the problem . Is it about registry or another things
>you said . Please , tell me details .

About things I said.

What you do is unreliable by definition. It is absolutely normal that this approach works on one machine and does not on another.

--
Maxim S. Shatskih
Windows DDK MVP

http://www.storagecraft.com

>The OS was XP SP1 and parallel port base address was 378h . I had used
>import() and outport() macros and no problem .

Proper way of doing things like this these in proper OSes (like Windows or Linux or FreeBSD or MacOS):

a) look at the API to the OS-provided parallel port driver
b) if this API is enough for you - use it
c) otherwise, develop a _full replacement_ of the OS-provided driver. To install such full replacement to Windows, patch the ImagePath registry value, this will get rid of PnP (but not KMCS!) signature checks.

inport() and outport() can only be used reliably for your purpose in MS-DOS or the standalone bare-metal OS-less boot environment (but modern days people usually avoid them in favour of WinPE - better but requires the royalty - or specially tailored Linux - worse but free).

--
Maxim S. Shatskih
Windows DDK MVP

http://www.storagecraft.com

>I think i must use "\Device\ParallelPort0" for parport.sys . i have hp
>laserjet 1320 printer.it is bidirectional

And what is the exact task you need to do to the printer?

--
Maxim S. Shatskih
Windows DDK MVP

http://www.storagecraft.com

> Only printing.
What are you doing that cant be done via a regular printer driver?

>Only printing.

Then why not use the mainstream Windows API?

They are printer-independent after all.

More so: parallel port is dying, and most printers are USB now.

--
Maxim S. Shatskih
Windows DDK MVP

http://www.storagecraft.com

>I want to print a simple text documan , in kernel-mode,from a kernel-
>driver i had written

Offload all of this to user-mode process which will call the standard GDI APIs.

--
Maxim S. Shatskih
Windows DDK MVP

http://www.storagecraft.com