From: pete@dunnington.u-net.com (Pete Turnbull)
Subject: [pups] 2.11BSD disklabel-programm
Date: Sun, 20 Jan 2002 14:57:31 GMT [thread overview]
Message-ID: <10201201457.ZM10594@mindy.dunnington.u-net.com> (raw)
In-Reply-To: jkunz@unixag-kl.fh-kl.de "Re: [pups] 2.11BSD disklabel-programm" (Jan 19, 22:35)
On Jan 19, 22:35, jkunz at unixag-kl.fh-kl.de wrote:
> Only the first 3 slots are Q/CD. The other 5 slots are Q/Q in serpentine
> bus grant wiring. Tony said that the memory should be in the first
> slot.
Lothar later said this is an H9276-A. That's a straight backplane, all
Q22/CD. It seems he has a BA11-S not a BA23 :-)
BTW, DEC normally recommended all comms and network cards go after the
memory, tapes next, then disks.
> AFAIK some 11/73 labeld boxen where sold with a 11/83 CPU in the first
> slot and the memory in the second.
It's the order of the boards (and the boot ROMs) that make it 11/73 or
11/83, not the circuit board. Though original 11/73s are 15MHz and
original 11/83s are 18MHz.
> AFAIK a 11/83 CPU can use QBus and (or?) PMI memory. If it is
> configured with QBus memory it is calld a "11/73". But keep in mind
> that there is a "real" 11/73 CPU (M8192 = KDJ11-A).
That's a dual-height board, CPU only, with no boot ROMs, LTC, or SLUs. It
was only sold as an OEM product or as an upgrade to 11/03 or 11/23 (not
11/23+ or microPDP-11/23) systems. Whilst it is a "real 11/73", it's no
more "real" than any other :-)
> Hmm. Are there Q/CD only BA23 backplanes?
No. There are straight Q/CD and serpentine Q/Q backplanes of the same size
but they're only used in other boxes (like BA11-N and BA11-S) or sold as
OEM units.
> I never saw a front panel like that, but your assumption sounds right.
> All my front panels have only one disk write protect / online switch.
The BA23 was only rated for one hard disk and either a TK50 or an RX50, but
the BA123 (which uses the same panels) was rated for up to 4 MSCP devices.
That's why the WP and ONLINE switches and LEDs are on a subassembly, so
you can add another one.
--
Pete Peter Turnbull
Network Manager
University of York
next prev parent reply other threads:[~2002-01-20 14:57 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-19 19:47 lothar felten
2002-01-19 21:35 ` jkunz
2002-01-20 14:57 ` Pete Turnbull [this message]
2002-01-20 17:45 ` Jochen Kunz
[not found] ` <jkunz@unixag-kl.fh-kl.de>
2002-01-20 18:31 ` Pete Turnbull
-- strict thread matches above, loose matches on Subject: below --
2002-01-27 22:42 [pups] solution for the disklabel lothar felten
2002-01-30 8:28 ` Johnny Billquist
2002-01-26 12:50 [pups] 2.11BSD disklabel-programm lothar felten
2002-01-26 17:39 ` jkunz
2002-01-28 21:38 ` Wilko Bulte
2002-01-29 18:34 ` emanuel stiebler
2002-01-19 11:43 lothar felten
2002-01-19 13:49 ` jkunz
[not found] ` <lothar.felten@gmx.net>
2002-01-19 16:05 ` Pete Turnbull
2002-01-19 22:18 ` Pete Turnbull
2002-01-20 1:05 ` AW: " lothar felten
2002-01-20 11:44 ` jkunz
2002-01-20 15:01 ` Pete Turnbull
2002-01-20 14:57 ` AW: " Pete Turnbull
2002-01-30 3:13 ` [pups] solution for the disklabel Pete Turnbull
2002-01-30 15:03 ` Johnny Billquist
[not found] ` <bqt@update.uu.se>
2002-01-30 18:14 ` Pete Turnbull
2002-02-04 19:27 ` [pups] VT102 and other hardware.... was: " lothar felten
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