Re: [ros-dev] csrss.exe and VDM ?

[Alex Ionescu]

Filip Navara wrote:

> >  + 16-bit
> > virtual DOS machine (VDM)
> >     
> >  
> CSRSS is involved here, but the main VDM process is NTVDM.exe which
> executes Win16/DOS programs and uses special kernel calls
> (NtVdmControl or how is it called). The emulated devices are
> handled by special device drivers (see DDK for details, there's
> special section about VDD drivers and DDK Graphics Drivers section
> has some info about VDM graphics handling)
>
>   
>
> >  Is in the csrss.exe (from ReactOS) the VDM process
> > inluded?
> >     
> >  
> No.
>
>   
>
> >  I read in the old forum that someone spoke about
> > an DOS/win16
> > subsystem.
> > Should the DOS (virtual maschine) be a part of the csrss.exe?
> >     
> >  
> See above.
>
>   
>
>   
>  
Just to add some information, CSRSS is quite more involved then Filip 
would make it seem :). Although NtVdmControl is used for hardware kernel 
calls, almost all the 1) Console and 2) VDM Emulation is passed back 
through CSRSS. CSRSS is the one who executes the loops to get the newest 
emulated commands to do, and who handles all the I/O.

Best regards,
Alex Ionescu