(no subject)

[Frank Arnold]

>
>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