In message <200208170706.DAA28253@Sparkle.Rodents.Montreal.QC.CA>, der Mouse wr
ites:
>> Anyway, this machine has a PROM version 2.22.1H and a 50pin SCSI
>> ribbon connector to where the drive(s) used to be. (I guess that
>> would make it a 10, since I know the 20 used SCA drives, so it would
>> need a wider or secondary cable for the extra SCSI lines.)
>
>I don't think SCA has any extra SCSI lines.  It just puts SCSI on the
>same connector as the ID setting and power.  (That is, it has extra
>lines, but they're not SCSI lines.)  Or, to put it another way, the
>"secondary cable" you refer to would be the power connector and
>something to set the SCSI ID.  I'm sure someone will correct me if I'm
>wrong about SCA! :-)

What I meant by that was I thought the SCA->motherboard cable would
at least be wide SCSI, which would be 68 pins, not 50.

>Thus, it could be a 20 clone and still use 50-pin-header drives.  It
>just wouldn't be a 100%-peripheral-compatible clone.  I know I'd love a
>20 that didn't make me dig up SCA drives... :-)
>
>> (A sure fire way to tell if it's a SS10 or SS20 would be nice too.
>> I'm just guessing at the moment.)
>
>Drop a stick of RAM in it, turn it on, and see what the banner says?

Hmm, yes, if I had one.  A 30 pin or 72 pin SIMM won't fit. 8^) It
has a Sun power supply, and after looking on docs.sun.com, the
board layout looks amazingly like a SS10.  Quick question: What is
just to the right of the RAM SIMM slots?  The SS10 graphic had some
block there like a pair of short SIMMs or something, and my board
has empty spaces labeled J0401 and J0402. And on the right rear
corner it looks like there is a blank space for a 13W3 connector
to be soldered in.

Oh, BTW, just like the SS10 and in the same places are J0801, J0802,
J1401, J1404, and J1403 jumpers, the NVRAM, EPROM, J1501 power,
and J0601 SCSI.  It's looking more and more like an exact SS10
clone with a metal case (instead of metal and plastic case) to me.

The rear connectors are also left to right:

ISDN TE (parallel / AUI) KBD Serial 10bT SCSI

and on the far right is a blank space for cutting out a 13W3 sized
hole?

So going on the assumption that this is really an SS10, any
suggestions what kind of MBUS board(s) I should get?

Jon

P.S. Thanks to Charles Carvalho for reminding me about docs.sun.com
where I found these tiny little gifs that still leave me curious
about the missing connectors on this board, but otherwise confirm
a striking similarity of my board to an SS10 board.