8 Jul
1998
8 Jul
'98
4:06 a.m.
Ethan Dicks wrote:
Personally, if it came to building a board from scratch, I'd have to say I'd
prefer a MSCP
compatible Dual IDE controller. Drives are cheaper. I can just see sticking four 5g IDE
drives into
my BA123 - 20 g of space, for less than a grand. Gee, I wonder if the power supply could
handle it
(snicker). There are MSCP docs somewhere out their on the web - or you could talk to the
NetBSD-vax
people, I believe at least one of them has the MSCP handbook. I'd buy it if you built
it. (well, a
Q-bus version, anyway)
--
J. Buck Caldwell
Engineer - Technical Support - Webmaster
Polygon, Inc. email:buck_c@polygon.com phone: (314) 432-4142
PO Box 8470 http://www.polygon.com/ fax: (314) 997-9696
St. Louis, MO 63132 ftp://ftp.polygon.com/ bbs: (314) 997-9682
Best way to
go: Find a Unibus SCSI controller. Rare, expensive, but well
worth the cost.
I haven't seen one that I could afford. I'd love to have SCSI on *any* VAX.
I'd even considered building my own (I used to manufacture a Q-Bus/Unibus/VAXBI
line of synchronous serial cards based on the 68000). The thing that held me
back was a lack of knowledge of how to emulate an MSCP device with something
that is *not* register compatible with an RQDX[123] or UDA50. I have written
VMS device drivers from scratch, but not _disk_ device drivers.