HP 35S

[The Don]

CLVARx
the manual says that this "erases" all the indirect variables.
it does not use the term Registers, and yet asks for placeholders 000 to 800
the back of the manual, states that it clears "indirect variables .. to zero

So does it put a ZERO in the Variable
Is this Variable, the Registers 000 to 800, where x is the Registers above which the 0 is inserted

Why would this instruction not be accepted as a program step