Simon,

] > an ss20.  (ie: did they make a dual board in 150, 200?)  That 75MHz cpu 
] > that you have in there wouldnt be a SuperSparc II by any chance? [#-)
] 
] dmesg says:
] 
] cpu0 at mainbus0: TMS390Z50 v0 or TMS390Z55 @ 75 MHz, on-chip FPU
] cpu0: physical 20K instruction (64 b/l), 16K data (32 b/l), 1024K external (3
}2 b/l): cache enabled
] 

Yes, that is exactly what my dmesg says,  the prom says something entirely
different on boot. 

           SMCC SPARCstation 10/20 UP/MP POST version VRV3.43 (01/09/95)


CPU_#0       TI, STP1021APGA(2.x)       1Mb External cache

CPU_#1       ******* NOT installed *******
CPU_#2       ******* NOT installed *******
CPU_#3       ******* NOT installed *******


	      >>>>> Power On Self Test (POST) is running .... <<<<<


SPARCstation 20 (1 X SuperSPARC-II), No Keyboard
ROM Rev. 2.22, 288 MB memory installed, Serial #7819401.
Ethernet address 8:0:20:77:50:89, Host ID: 72775089.


Note the CPU_#0, on the TMS390 module it shows up as such rather than STP1021.
The logic in the kernel that puts the string up is driven by a simple
table it appears.  the @ 75 is probably the indication that its a II..

-=erik.