difference between LSI-11 CPU's M7264 and M7270

[Gooijen, Henk]

> -----Original Message-----
> From: cctalk-bounces at classiccmp.org 
> [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Allison
> Sent: maandag 26 september 2005 15:20
> To: cctalk at classiccmp.org
> Subject: RE: difference between LSI-11 CPU's M7264 and M7270
> 
> >
> >Subject: RE: difference between LSI-11 CPU's M7264 and M7270
> >   From: "Gooijen, Henk" <GOOI at oce.nl>
> >   Date: Mon, 26 Sep 2005 13:42:48 +0200
> >     To: "'General Discussion: On-Topic and Off-Topic 
> Posts'"	<cctalk at classiccmp.org>
> >
> >Thanks Pete.
> >I had a look at the backplane yesterday, but did not see an 
> >Hxxxx number.
> >There was a xx-yyyyy (?) digit number, but I will check 
> >again this evening.
> 
> That number may be cross referenced to a Mxxxx number.  Most 
> likely M9270 as that was common use for the BA11M based 
> LSI-11/03 system package with H780 PS.  The H780 carries two 
> fans and is known to sing (high pitch
> whistle) and that is most recognizable!
> 
> >
> >   <------ M7270 ------> <------ M8044 ------> ==================
> >   <------ empty ------> <------ M7940 ------> |  o o  __ __ __ |
> >   <------ empty ------> <------ empty ------> |       ~~ ~~ ~~ |
> >   <------ empty ------> <------ empty ------> ==================
> 
> usual config is: 
>   M7264 (quad)
>  option2|option1
>  option3|option4
>  option5|option6
> 
> Others:
>   M7270 |M8044
>  option2|option1
>  option3|option4
>  option5|option6
> 
> Option1 is typically DLV11 (SLU)
> option2 is typcailly DLV11 (SLU#2)
> option3 is typically RXV11 (floppy)
> option4 is typcically REV11 (floppy boot prom)
> 
> It is also possible to use core (MMV11-A) in this system but
> it leaves limited space for serial or disk interfaces.
> 
> >The figure is as seen from the front side when the front 
> cover is removed.
> >The "art work" shows the panel with the switches and LEDs at 
> the right.
> >To remove a board from the cage you must pull the board "out of the
> >screen", so the magenta handles are at the front side.
> >
> >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.
> 
> M7264 and M7270 are identical CPUs (LSI-11 chipset aka 
> KD-11F) with the differnce
> that the M7264 has 0 to 4k of local ram on the card.  Bus 
> usage is identical and
> they are 16bit address (Q16).
> 
> >It makes perfect sense that I will have to adjust the base address of
> >the memory on the M8044 if I install the M7264.  I will take an other
> >look at the memory board with the new information from you.
> >I will dig up the MicroNotes!
> 
> Correct.  Note: M8044 can have variable population of ram and there 
> are varients for sizes from 4KW (W is 16bit word) to 32KW.  the board
> also carried parity is some versions.
> 
> M8044-AA 4k no parity  MSV11-DA
> M8044-BA 8K no parity  MSV-11DC
> M8044-CA 16K no parity MSV11-CA
> M8044-DA 32K no parity MSV11-DD
> M8045-DA 32k Parity    MSV11-ED
> 
> >It will be interesting to see what the system does when I 
> power it up.
> >The console is connected to the M7940 ... I hope to see a prompt!
> 
> Base DLV-11 SLU, make sure the addresses and vectors are 
> setup as console.
> (177560rx, 177564 tx, v60rx,V64tx)  nominal baud rate could 
> be anything 
> from 110-9600.  Common baud used was 300, 1200 and 9600.
> 
> >Regarding the M8018 WCS option: is this "just" a chip, like 
> FIS or the
> >big CIS one? I thought it was a board (module) as the M 
> number suggests.
> >Anybody here has a M8018 WCS and can tell more about it?
> 
> It'a a board of quad width.  Power for the board comes off the bus but
> it's signals are a cable to one of the LSI-11 microm sockets (40 pin).
> Besides acting as programable microcode store there are IO registers 
> to allow writing and reading the ram content as well as mapping where 
> the code store appears in CPU microcode address map.
> 
> 
> Allison

Thanks Allison!
Together with the info from Pete I am on the safe side to turn on power.
BTW, I assume that you made a typo in the serpentine:
>  option2|option1
>  option3|option4
>  option5|option6
That last line should be option6|option5, or ......?

73,
- Henk, PA8PDP.