P (Proceed) - Execution of the program up to the specified address.

Format: P segment:address

     This command sets a temporary breakpoint at the specified address and
starts the program. When the processor encounters the breakpoint (or another
one set by B command) the execution of the program is suspended and the
temporary  breakpoint is removed. The breakpoint is also cancelled by any
other break of the program.

ATTENTION: The breakpoint cannot be set in ROM zone. In such a case a
            message 'Can't set breapoint in ROM' is displayed.