Re: The CVPPC on board SCSI driver.

[Rene B. <re...@we...>]

On 2002.07.24 12:33 Ken Tyler wrote:
>=20
> I came across a pait of 4.3 Gig UW SCSI drives at a give away price the
> other day.  I thought I might grab them and have ago.
>=20
> What's the status of the driver ?
>=20
> I know it doesn't work and that Fred H (possibly someone else too ) hav=
e
> tried modding existing drivers.
>=20
> Which driver almost worked (can't remember the details - some sort of
> cache coherency problem ?).


Hi, Ken!

I'm working on the driver. But I have to give up my work for several=20
month, due to lack of time. But for some weeks, I got a little time back=20
and contiune my work on the driver.

So, for now it seems that all the cache coherency problems are solved. An=
d=20
the communication between the lowlevel and midlevel SCSI driver thru DMA=20
seems working correctly now (which wasn't since i stopped my work). The=20
driver detects the devices connected to the SCSI bus and prints out the=20
names, revision numbers and so on.
After that, when the driver tries to reselect a device (for reading out=20
the capacity...), I got an illigal instruction exception from the SCRIPTS=
.=20
But there is no illegal instruction. The documentation of the 53c770 says=
,=20
that illigal instruction exception also occur on some illegal phases on=20
the SCSI bus. I don't know much about SCSI bus arbitration, but I'm=20
learning...


Ciao, Ren=E8