On Sun, Jun 3, 2012 at 1:42 PM, Ethan Dicks <ethan.dicks at gmail.com> wrote:
My Dilog boards are, according to the paper labels in the upper-left
corner, SQ3703As. One is marked Rev G and looks clean. The other is
a Rev E with a few green ECO wires (the Rev E board has an EPROM
marked "Rev G", and the Rev G board has firmware marked "Rev H".
I'm guessing there isn't a lot of info out there to attempt to see if
it's possible to "convert" an SQ3703A to an SQ3706A in the field, but
if anyone knows anything about both boards, I'd be game to try if it's
EPROMs or PALs or whatever.
This is an old thread. I finally got around to taking a look at both
my DILOG TMSCP SQ3703A REV G and MSCP SQ3706A REV H controllers side
by side. All of the DIP parts in sockets with labels have the same
numbers on them, except for the EPROM.
The firmware on the TMSCP SQ3703A REV G is 46U 92782, REV J
The firmware on the MSCP SQ3706A REV H is U46 92734, REV L
As a quick test I replaced the EPROM from the TMSCP controller with
the EPROM from the MSCP controller and now it does appear to be
functioning as a TMSCP controller. I did have to change the CSR
address from the default TMSCP address to the default MSCP address in
the controller configuration menu but didn't do anything else and was
then able to boot from a SCSI DISK device.
I'll have to dump the EPROM contents (27512) in case anyone else has a
SQ3703A TMSCP controller they would like to try as an MSCP controller.