(no subject) - test-drb@ccmp.vtda.org

27 Sep 2005

...

Message: 28
Date: Mon, 26 Sep 2005 13:42:48 +0200
From: "Gooijen, Henk" <GOOI at oce.nl>
Subject: RE: difference between LSI-11 CPU's M7264 and M7270

> -----Original Message-----
> On Sep 26 2005,  8:40, Gooijen, Henk wrote:
> 
> 
> >    <-- M7270 -LSI11/2--> <--- M8044 MSV11----> ==================
> >    <------ empty ------> <--- M7940 DLV11----> |  o o  __ __ __ |
> >    <------ empty ------> <------ empty ------> |       ~~ ~~ ~~ |
> >    <------ empty ------> <------ empty ------> ==================
> > 
Henk, there is no bootstrap in this system....

...

The FieldGuide says that a few lines are used for something else, but
I expect (hope) that the M7270 and the M7264 usage of all connections
is identical. 
No, I think only the LSI11 suplies refresh to the bus, LSI11/02 does not.
They use some of the sspare lines for that, that much later got used for
Adressbits 19-21 once Q-bus got Q22

...

Regarding the M8018 WCS option: is this "just" a chip, like FIS or the
big CIS one?  
Those are LSI11/23 options...

...
 I thought it was a board (module) as the M number
suggests.
Anybody here has a M8018 WCS and can tell more about it?

Unfortunately I dont have this (still hunting), but yes, I is a board. It
takes only the power from the Q-bus and connects with a flatcable to the
microm socket on the LSI-11 module. 
I also heard the fact that this works (or was DEC-supported) only on the
quad LSI11, but can't see a good reason for this, as the chipset is
identical. It even has the empty socket to connect the WCS-option.
Maybe the engineering drawings will tell more.

Frank