| 摘要 |
<p>A special purpose prefix is defined which replaces the normal op-code field of an instruction, having the effect of translating that instruction from a normal instruction into an instruction with various formate extensions in addresses, indices and/or augments. The normal instruction addressing of the system has six basic formats which include: bank and subaddress coding; subaddress and index; indirect indexing; direct control addressing; indexed control addressing; indirect, indexed control addressing, and "inactive" addressing. All of the normal instructions may be extended with a special-purpose prefix.</p> |
