Check that uM only permits read/write between two modules at a time

For example, suppose that the LC-field is set to 10 (read from bus) and the FB field is set to the bus ID of some other module. As of right now, the FB control signal from uM will be set to the FB field and not 0 when executing the current micro instruction. As a result, data is written to LC and the other module in the same microinstruction. The code of the uM module needs to be checked for such special microinstructions where data is written to or read from a set module regardless of the TB and FB fields.