Designing central processors with bipolar microcomputer components

Most first and second generation MOS microcomputer products used single-chip fixed-control central processors or used specialized mask-programmed ROM's which made user microprocessing very cumbersome. Today, a third generation of microcomputer products using bipolar technology has appeared. These new components may be used to build controllers and computer central processing units (CPU's) in which the control structure is microprogrammed. By permitting microprograms in standard programmable ROM's, the bipolar microcomputer components offer much greater convenience for user microprogramming.