Re: [CAD_CAM_EDM_DRO] Windows timing subroutines, how do they work?

Hi Jon,

Art uses a low level driver that sets itself up with the highest
interrupt priority possible. This interrupt will always be served before
Windows gets a look in. The only thing that will pre-empt the driver is
an in-progress DMA transfer or a cpu wait. Rtai or RTLinux have exactly
the same priority as Art's driver though they achieve it in a different way.

Les

Jon Elson wrote:

>No, not at all. He uses a DLL that runs in real mode, essentially a
>device driver
>kind of code. It doesn't pre-empt Windows, like the RT Linux systems
>do, but just
>runs at a high priority.
>
>Jon
>
>