Re: UNIBUS M9312 ROMS (Don North)

[Don North]

On 6/10/2016 4:56 AM, Michael Thompson wrote:

From: Don North <ak...@mindspring.com>
Subject: Re: UNIBUS M9312 ROMS

Actually the page listed below is a big out of date with respect to some
M9312
images (it is not an up to date mirror).
The up to date page is at:  http://ak6dn.dyndns.org/PDP-11/M9312/

--
Don North
AK6DN


RCS/RI has some PDP-11/34 systems that booted, I think using DDCMP, via a
COAX interface from a PDP-10 KL10. I think that it took four ROMs to hold
the boot loader. You might not have a copy of those ROMs.

There is a three PROM set 23-86[234]A9 for device code XM which is DDCMP boot 
over a DMC11/DMR11. Those PROMs are available and on my web page.


A two PROM set 23-E3[23]A9 has been found for etherNet DELUA/DEUNA boot (device 
code XE?) but it has not been reverse engineered. Hopefully soon the device 
patterns will be read and forwarded to me for processing.


I am not aware of the four PROM set you mention, but it could certainly be a 
custom one for that application.



(XM) DECnet DDCMP DMC11/DMR11 	23-862A9 
<http://ak6dn.dyndns.org/PDP-11/M9312/23-862A9/23-862A9-0625.hex> 	0x0625 	SRC 
<http://ak6dn.dyndns.org/PDP-11/M9312/23-862A9/23-862A9.mac>

LST <http://ak6dn.dyndns.org/PDP-11/M9312/23-862A9/23-862A9.lst>  (1,2)
23-863A9 <http://ak6dn.dyndns.org/PDP-11/M9312/23-863A9/23-863A9-063F.hex> 
0x063F 	SRC <http://ak6dn.dyndns.org/PDP-11/M9312/23-863A9/23-863A9.mac>

LST <http://ak6dn.dyndns.org/PDP-11/M9312/23-863A9/23-863A9.lst>
23-864A9 <http://ak6dn.dyndns.org/PDP-11/M9312/23-864A9/23-864A9-0551.hex> 
0x0551 	SRC <http://ak6dn.dyndns.org/PDP-11/M9312/23-864A9/23-864A9.mac>

LST <http://ak6dn.dyndns.org/PDP-11/M9312/23-864A9/23-864A9.lst>


--
Don North
AK6DN

Re: UNIBUS M9312 ROMS (Don North)

[Michael Thompson]

>
> From: Don North <ak...@mindspring.com>
> Subject: Re: UNIBUS M9312 ROMS
>
> Actually the page listed below is a big out of date with respect to some
> M9312
> images (it is not an up to date mirror).
> The up to date page is at:  http://ak6dn.dyndns.org/PDP-11/M9312/
>
> --
> Don North
> AK6DN
>

RCS/RI has some PDP-11/34 systems that booted, I think using DDCMP, via a
COAX interface from a PDP-10 KL10. I think that it took four ROMs to hold
the boot loader. You might not have a copy of those ROMs.

-- 
Michael Thompson

Re: UNIBUS M9312 ROMS

[Don North]

On 6/8/2016 5:56 PM, Paul Koning wrote:

On Jun 8, 2016, at 6:46 PM, Jay West  wrote:

I wrote...
On Thu, Jun 9, 2016 at 6:34 AM, Jay West  wrote:

23-E39A9 is still lost to time, afaik. TMSCP - TU81

To which mike replied...

Could that not be reverse-engineered from the boot code in e.g. Emulex
UC17 ROMs? They could do TMSCP...

BTW what PROM blower would folks recommend for creating/imaging M9312 ROMs?

Possibly, but some (me) are sticklers for original code. Plus, I am not sure, 
but I think someone said this rom did something really bizarre to fit in the 
available rom space - self modifying code or something...

MSCP isn't all that hard.  The RSTS secondary loader fits in one block, and it 
contains not just code to speak MSCP but also enough room for a map of pointers 
to where the code to load lives (as opposed to the primary boot which just has 
to load one block from address zero).

paul


In an M9312 boot PROM there are 49. words of bootstrap space that are available 
for code and data. Getting an MSCP boot to fit in that space required playing 
some tricks like treating some specially crafted instructions as data values 
(and vice versa).



--
Don North
AK6DN

RE: UNIBUS M9312 ROMS

[Jay West]

I wrote...
On Thu, Jun 9, 2016 at 6:34 AM, Jay West  wrote:
> 23-E39A9 is still lost to time, afaik. TMSCP - TU81

To which mike replied...

Could that not be reverse-engineered from the boot code in e.g. Emulex
UC17 ROMs? They could do TMSCP...

BTW what PROM blower would folks recommend for creating/imaging M9312 ROMs?

Possibly, but some (me) are sticklers for original code. Plus, I am not sure, 
but I think someone said this rom did something really bizarre to fit in the 
available rom space - self modifying code or something...

Data I/O 29B

J

Re: UNIBUS M9312 ROMS

[Al Kossow]

decnet ethernet boot still MIA :-(


On 6/8/16 11:24 AM, william degnan wrote:
> Posted an inventory of my M9312 ROMs
> 
> http://www.vintagecomputer.net/browse_thread.cfm?id=638
> 
> b
>