Wilko Bulte wrote...
> As Kenneth D. Merry wrote ...
> > Wilko Bulte wrote...
>
> > > I have the distinct (bad) feeling this is due to:
> > >
> > > # A single entry for any of these controllers (ncr, ahb, ahc, amd) is
> > > # sufficient for any number of installed devices.
> > > controller ncr0
> > > controller isp0
> > > #controller esp0
> > >
> > > in GENERIC. I mean, esp is the driver for the 53C94 ncr scsi chip.
> > > Is there any particular reason why it is commented out in GENERIC?
> > > Floppy disk size limit maybe?
> >
> > The esp driver hasn't been ported to CAM. Are you volunteering? :)
>
> I noticed that when I tried to compile a TC-enabled kernel on my Aspen
> Alpine. Sort of familiar looking header files were missing ;-) Pre-CAM
> files obviously.
>
> Volunteering... if I could find the time. Unlikely..
Bummer.
> Is there a description somewhere how I can create my own test boot
> floppies? (I have a SCSI-interfaced floppy disk; works great BTW).
> I found write_mfs_in_kernel but the Makefile in /usr/src/release sort of
> escapes me in this respect (also in other respects to be honest..)
You should probably look at the PicoBSD stuff.
> How difficult would CAMifying a driver be?
Like the esp driver? I dunno. I haven't done it, so I can't say for sure.
It looks like the esp-type chips don't have an on-board phase engine, so
the driver has to do the work. So the driver behavior may be a little bit
more complicated than a driver for a mailbox-type card. My guess is that
it would be easier to write a TC front end for the amd driver.
> > One other, perhaps easier task might be to write a TurboChannel front end
> > for the AMD driver. Supposedly the AMD 53c974 and NCR 53C94 are pretty
> > much the same chip.
>
> Sounds like one needs to dig into the TC idiosyncrasies. I'd rather not.
I think that writing a TC attach routine for the AMD driver would be
a good deal easier than porting the esp driver to CAM. It seems like the
NCR 53C94 and AMD 53C974 chips are pretty similar.
I tell you what -- if you're serious about getting this working, talk to me
offline, and maybe I'll do the driver. I'd obviously need hardware,
though, since I don't have any of the hardware in question.
Ken
--
Kenneth Merry
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