Odd Q-Bus questions 18/22bit

From: Allison J Parent <allisonp_at_world.std.com>
Date: Tue Aug 18 12:38:28 1998

< two minutes? that is slow... I can boot my TU-58 based system
< in 30 seconds... (I engineered an optimized TU58 many years
< ago when people within Digital were asking how to get it to boot
< faster). It involves specific placement of various RT-11
< files on one of the four recording tracks. For those who wanted
< the system to run faster once booted, you could additionally take
< the step of loading stuff into VM and rebooting it it...

Having done that (I have a system I can demonstrate) plus the VM: trick
it's possible to build a really nice system using TU58 only! It's in the
V5 RT11 doc set.

FYI for the 11/730 hackers the TU58 boot tape for that beast also has an
optimum order for faster booting.

< (depending on the rev of the 11/23... only Rev.C could
< do so).

I've found earlier revs do, but not all and they may fail diagnostics
while appearing to work normally. I try to reserve 11/23 (KDF11-A M8186)
to 256k unless I've verified it's a REV-C or later and tested it.

The later 11/23B (KDF11-B M8189) is Q22 and saves needing a boot rom/card.
They are common enough.

Allison
Received on Tue Aug 18 1998 - 12:38:28 BST