On Fri, 2007-08-31 at 23:02 -0400, Mike Frysinger wrote:
> i really dont know how the maple bus works or what piece of hardware is wired
> up to the same interrupt line. my point is that if the other device fires an
> interrupt, the pvr interrupt handler may be executed and attempt to do work
> when in reality the pvr was not the source of the interrupt.
> -mike
The interrupt is *always* fired by the PVR - it is the VBLANK - ie
essentially screen refresh. It is *never* generated by the maple bus.
However, the maple bus is/can be hardware synced - which means once that
setting is made then the hardware will *always* be polled on the VBLANK.
In other words there is no need to check which device is interrupt is
for, because it is *always* going to be for both of them.
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