On Mon, 3 Mar 2003, gabriel rosenkoetter wrote:

>
> On Sun, Mar 02, 2003 at 11:11:04PM +0100, Riccardo Mottola wrote:
> > The problem would also remain SCSI access, which on the 840 is still dogslow
> > and CPU consuming (no dma)
>
> Last I heard, Allen Briggs had looked at and was thinking about that
> problem. Or, at least, he's got my 840AV to do so. ;^> It's dealing
> with the (mostly undocumented, propietary) DMA chip in the SCSI
> controller.
>
> Allen, of course, has at least one day job. I'm sure he'd be glad
> for someone to help him out.

I don't have an AV Mac, but I do have a Daystar Image 040 (40Mhz 68040 PDS
accelerator card with two AT&T DSPs on a daughtercard, used for Photoshop
acceleration typically).  Since Daystar used the same AT&T DSPs as Apple
did in the AV Macs, it might be nice to design the netbsd DSP support to
include them as well.  I believe Radius wrote the driver software that
mapped the DSPs into the Mac memory space and interfaced to the Photoshop
accelerator plugins, and Radius also offered two- and four-DSP
daughtercards for some of their high end NuBus video cards, which probably
map in the same way.

Is there any way I could help out with the Daystar Image 040 I have?

--
Nathan Raymond