Re: [Qemu-devel] Log I/O from host Parallel Port?

[Steve Ellenoff]

Thanks Vincent!

I guess I should have just looked in the parallel.c file.. Not being too 
familiar with linux, I just assumed the port was forwarded to linux, I 
didn't realize qemu had to code the transfer of data, and thus could easily 
log it. Now that I think about it, that's pretty stupid of me to think.. :)

Thanks for setting me in the right direction.
-Steve



> From: Vincent Palatin <address@hidden>
> To: "Steve Ellenoff" <address@hidden>
> CC: address@hidden
> Subject: Re: [Qemu-devel] Log I/O from host Parallel Port?
> Date: Tue, 8 Aug 2006 11:54:16 +0200
>
> On Tuesday 08 August 2006 11:05, Steve Ellenoff wrote:
> > Is there any easy way to log all I/O data reads & writes to/from the 
> host
> > parallel port, when using the -parallel /dev/parport0 option?
> >
> > My host is connected via parallel port to some custom hardware and I'd 
> like
> > to be able to diagnose why the hardware's not working, by seeing the 
> data
> > stream of the port.
>
> Near the top of the file "hw/parallel.c", you can find the following line :
> //#define DEBUG_PARALLEL
>
> just uncomment it and rebuilt qemu, all parallel I/O will be written to
> stdout. (or feel free to modify the printf traces)
>
> --
> Vincent