Hi! The SM512 is for the 4/6x0 MP. This might be the reason, why it doesn't work propperly in the SS10. On the other hand, the SM-100 modules work ok in a SS10, despite the fact that Sun says these were 4/6x0 only. But of course only under SunOS. This is not too bad, since the SM-100 are dreadly slow under Solaris... Tschuess Peter