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Hello,

> > > The end result will *not* be compatible with any current X11
> > > driver.  However, one could write a driver and probably even make
> > > it "safe" to run unprivileged.
> >=20
> > This would be a nice addition to XFree's wsfb driver. And handling
> > acceleration in kernel would allow to queue blitter commands and use
> > interrupts to run them asynchronously. Maybe there should be a
> > simple packet format describing them ( like a command, plane mask,
> > ROP, coordinates, other data, so it would easily be usable for X )
> > and an ioctl that simply takes a pointer to a buffer full of them,
> > enqueues them and maybe sets completion flags.
>=20
> This sounds eerily like the interface DEC used in Ultrix, sometime
> in the late 1980s.  The pmax port implements the kernel side of that
> interface, for some graphics hardware at least -- it might be worth
> looking at.
>=20
> I think it's also written up in at least one paper.

I didn't expect that thought to be new in any way - after all it's just
the straight forward thing to do. Thanks for the pointer, I'l have a
look.=20

have fun
Michael

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