Operand entries

You may specify one or more operands in each machine instruction statement to provide the data or the location of the data upon which the machine operation is to be done. The operand entries consist of one or more fields or subfields, depending on the format of the instruction being coded. They can specify a register, an address, a length, or immediate data. You can omit length fields or subfields, which the assembler computes for you from the other operand entries. You can code an operand entry either with symbols or with self-defining terms.

The rules for coding operand entries are:


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