The MV/8000 Microsequencing subsection is presented as a case study of a microprogrammed CPU engine. A brief, but comprehensive, description of the micro-orders are discussed with both hardware and firmware aspects considered. Features that are highlighted include: Micro-interruptability (a micro-trapping mechanism); True microsubroutining of macroinstructions (IPOP); Micro-dispatching capability; and test and toggle micro-controllable flags.
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