Subject: RE: VS2000 and SCSI - it works!
To: Jerome Tonneson <>
From: Andrew Back <>
List: port-vax
Date: 07/01/1999 10:03:27

Don't know if this helps. In a mail I received from Wolfgang:

"The instructions on 'how to' patch aren't yet all written up.
Tools are currently found in my .../vms/ka420/ subdirectory, ostensibly
for patching the (2 64kx16) Vs3100 ROMs, however the programs there
allow for an `undocumented' "/4" switch which makes them checksum and
'split' the result into the 4 64kx8 pieces making up the '2000 ROM."

I think you do have to patch/burn all four ROMs.


-----Original Message-----
From: [] On Behalf
Of Jerome Tonneson
Sent:	Wednesday, June 30, 1999 9:24 PM
Subject:	Re: VS2000 and SCSI - it works!

>Anyways...  27512's are 64KB EPROM's, so this is 256KB of PROM.  I have no
>clue just yet whether this is 256K x 8-bits, 128K x 16-bits, or even 64K x

>If its 32-bits wide, to modify the boot PROM monitor would obviously
>all 4 PROMs to be reprogrammed and replaced.

I also read the PROMS from a VS2000 a while back.  This is 64K x 32 bits.
I can't remember the byte ordering, but by looking at the first 256 bytes
or so of each ROM one can figure it out.