Subject: Re: kern/2841: NCR 53c810 driver is slow. Here's a faster one
To: None <netbsd-bugs@NetBSD.ORG>
From: Jim Howard <email@example.com>
Date: 10/18/1996 11:05:38
At 07:23 PM 10/16/96 -0500, Dave Huang <firstname.lastname@example.org> wrote:
> I don't have wide either, but I did see a lot of places where (something &
> 7) was changed to (something & 0xf).
Those places increase the number of targets (devices) supported from 7 to
15. That would be useful for some people, it has *no* bearing on your
I've deduced that the 53C860 is a narrow Ultra SCSI chip. So here's the lineup:
53C810 8-bit Fast SCSI-2 full support in NetBSD 1.2
53C825 16-bit (wide) Fast SCSI-2 full support in NetBSD 1.2
53C860 8-bit Ultra SCSI new in your patch
53C875 16-bit (wide) Ultra SCSI partial support in 1.2, full in patch?
Your patch seems to fill out the device support. But I'm *still* at a loss
as to why you would need it to get your Fast SCSI-2 Quantum Atlas running at
normal speed with a 53C810.