Code Field

This field contains a code which identifies the machine operation (add, subtract, jump, etc.) to be performed: hence the term operation code or op-code. The instructions described in Sections 3. 3 thru 3.11, are each identified by a mnemonic label which must appear in the code field. For example, since the “jump unconditionally” instruction is identified by the letters “JUN”, these letters must appear in the code field to identify the instruction as “jump unconditionally”.

There must be at least one space following the code field. Thus:

LAB,    JUN     AWY

is legal, but

LAB,    JUNAWY

is illegal.