PDP-11: Disk over Serial proposal
Tim Shoppa
shoppa at alph02.triumf.ca
Mon Dec 8 04:05:23 AEST 1997
> > Many (most) Q-bus processors have TU58 bootstraps in firmware.
> > Certainly all 11/73B, 11/83, 11/93, 11/84, and 11/94 have the
> > bootstraps.
>
> Are you sure, Tim? My 11/73 doesn't
Is this a KDJ11A (dual-height, no boot ROMs on the CPU board) or
a KDJ11B (quad-height, boot ROMs on the CPU board)? If you
have a KDJ11A, then your boot ROM resides in a MXV11, a BDV11, or
elsewhere (possibly a third-party controller) in your system. (You'll
notice that I said "11/73B" in my above message, because the
KDJ11A has no boot ROMs at all...)
My KDJ11B has the following built in bootstraps (listed through
"Setup" in the boot menu or with a "Boot" followed by a "?"):
DU 0-255 CPU ROM RDnn, RXnn, RC25, RAnn
DL 0-3 CPU ROM RL01, RL02
DX 0-1 CPU ROM RX01
DY 0-1 CPU ROM RX02
DD 0-1 CPU ROM TU58
DK 0-7 CPU ROM RK05
MU 0-255 CPU ROM TK50, TU81
MS 0-3 CPU ROM TK25, TS05
XH 0-1 CPU ROM DECNET ETHERNET
NU 0-15 CPU ROM DECNET DUV11
NE 0-15 CPU ROM DECNET DLV11-E
NF 0-15 CPU ROM DECNET DLV11-F
If your KDJ11B doesn't allow you to see the above list, then
the boot menu has been disabled and it has been set to only
auto-boot. I can tell you how to reconfigure to get at the
boot menu.
> and according to my microPDP-11
> Maintenance Manual, only the 11/23+ and microPDP-11/23 have TU58 -- the only
> tape devices listed for 11/73 and 11/83 are TK25 and TK50 (my manual is too
> old to include 11/53 and 11/93).
Part of the confusion may lie in the fact that TU58's appear to the system
to be disk (block-addressable) instead of tape devices :-). The downside,
of course, is that it's a disk with a 30-second seek time!
I certainly don't want anyone to think that I'm extolling the TU58 as a
perfect wonderful device. There are lots of reasons to *not* use them. My
point was mainly that the RSP (radial serial protocol) used to speak to
them is well-defined and already exists; there's no use in re-inventing
the wheel.
Tim. (shoppa at triumf.ca)
Received: (from major at localhost)
by minnie.cs.adfa.oz.au (8.8.5/8.8.5) id IAA21994
for pups-liszt; Mon, 8 Dec 1997 08:11:11 +1100 (EST)
X-Authentication-Warning: minnie.cs.adfa.oz.au: major set sender to owner-pups at minnie.cs.adfa.oz.au using -f
More information about the TUHS
mailing list