У меня под рукой сейчас нету схем....но сли

> N33 is the 'alternate' BR1# (SMP bus request) pin on the CPU - X2 is the
> documented BR1#. Most slot adapters use X2 (e.g S370-DL). The Slot-T
> also uses X2 out of the box, but dual processors on the P2B-D/DS don't
> work until you change it to N33. The PL-P3/SMP has an X2/N33 jumper, and
> it works *either way* on the P2B-D/DS!