If an expression is given at the SCODB prompt, its value is printed (by default, in hexadecimal). If the value is near a symbol's address, the symbol will also be displayed.
The simplest expressions that can be given to SCODB contain only hexadecimal digits:
debug0:1> D012
D012
Decimal input may be given by preceding the number with a dollar sign:
debug0:2> $128
80
Octal input may be given by the number with a leading zero:
debug0:3> 040
20