[Sunhelp] Jumper settings on a SS10

[Matthew Schumacher]

Hello All,

I just recently got a SS10 from a guy at a local users group and started
looking into upgrading the cpu.  The cpu that is in it now appears to be
a 501-2219 (SM40) because the first 7 digits of the number on it is
5012219, which means that it should be running at 40mhz.  However, when
I run a 'module-info' my machine tells me I have a 36mhz cpu.  After
doing some digging I found this page: 
http://www.sunhelp.org/faq/sunref3.html which says this about my
motherboard:

--snip--
J1401
 270-1733-12: (single jumper in near left)
  Jump to select 66MHz (model 20)/72 MHz clock                  JUMPED
 270-1733-13: (3-pin jumper in near left, pin 1 to right)
  1-2   Select 80MHz clock
  2-3   Select 66MHz (model 20)/72MHz clock                     JUMPED

J1403 (3-pin jumper in near center, pin 1 to left)(270-1733-12 only)
 1-2    Select 66MHz (model 20)/72MHz clock                     JUMPED
 2-3    Select 80MHz clock

J1404 (3-pin jumper in near center, pin 1 nearest)(270-1733-12 only)
 1-2    Select 66MHz (model 20)/72MHz clock                     JUMPED
 2-3    Select 80MHz clock
--snip--
And this about my cpu:
--snip--
501-2219        SM40 SPARC module Mbus
        40MHz SuperSPARC. For use in SPARCstation 10 (but not model 20).

        SunOS 4.1.3 is required. Only one of these modules is supported
        in a system.

*       The SPARCstation 10 clock should be set to 80MHz.

        At location F0401 is a 5A fuse, P/N 150-2085.

        Power requirements are +5V @ 2.86A.
--snip--


So my hunch was that my jumpers where set wrong.  My motherboard is
obviously the 270-1733-12 version because I have only 2 pins on J1401
and I also have J1403 and J1404.  Here is the odd part, and the
question, my system is currently set to:

J1401 on
J1403 2-3 on
J1404 2-3 on

Am I wrong for reading that J1404 was supposed to be off if the system
is set to the 80mhz clock?  Also, I cannot get the system to boot if I
remove J1401 to try and get the cpu to run at 40mhz.  What is the
correct way to make my system run at 40mhz?

Thanks for any help you can send,

schu