On Fri, 18 Mar 2005 13:07:39 +0100, Attila Kinali <[EMAIL PROTECTED]> wrote:
> BTW: how about replacing the threshold register by a
> DMA command that triggers an interrup ? Then it would
> be possible to insert interrupts at any arbitrary point
> ("drawing operation X has been completed") or leave it
> completely away if no interrupt is needed (when the driver
> is sure that the operation will finish before it will send
> the next commands).
The threshold register is what tells the GPU how to determine when to
interrupt. If you put, say, 1000 into the threshold register, then an
interrupt will be generated when there are only 1000 words left
unconsumed in the ring buffer.
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