3 Jan
2002
3 Jan
'02
7:42 p.m.
-----Original Message-----
From: Gooijen H [mailto:GOOI@oce.nl]
Sent: 04 January 2002 08:42
To: 'classiccmp(a)classiccmp.org'
Subject: 11/53 - Qbus backplane question
I got in the 11/53 running Micro/RSX.
The 11/53 has an H9278-A backplane. According to
Megan's fieldguide the first 3 slots are Q22/CD
and the last 5 slots are Q22.
What does that mean?
If I remember rightly the CD slots have grant continuity, which means you
can have half height boards in position 1/2 without needing grant continuity
cards in position 3/4 to carry signals over to the next slot. Can't
rememember the M code for the GC card ATM; my VAXen are 10 minutes away from
here.
--
Adrian Graham, Corporate Microsystems Ltd
e: adrian.graham(a)corporatemicrosystems.com
w: www.corporatemicrosystems.com
w2: www.binarydinosaurs.co.uk (Online Computer Museum)