Compaq AlphaServer DS20E Reference Manual page 227

The syntax is:
set cpu_enabled hex_digit
The hex_digit values are shown in the table.
Hex_Digit Value
0
1
2
3
Example
In the following example, CPU 0 and CPU 1 are enabled.
P00>>> set cpu_enabled 3
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Binary Equivalent
CPU enable 3210 (bit)
0000
0001
0010
0011
Enabled CPUs
No CPUs (CPU 0 still comes up)
CPU 0
CPU 1
CPU 0,1
Using the SRM Console 7-59