In this paper is presented an architecture of duplexmicroprocessor system for increasing the operating speed of computerized sequential machines

exploiting two ideas which sequential machines inherit. That is to say

（ 1 ） sequential machines of Mealy type possess proper characteristics of parallelism im their computation of next internal state and output state; （ 2 ） any sequential machine can be converted into a corresponding amount of autonomous sequential machines. Analysis shows that in comparison with the operating speed of single microcomputer scheme

the operating speed of the duplex-microprocessor system can be increased in a factor of 2.4.Based on the M6800 microcomputer family

a duplex-microprocessor sequential machine is designed to illustrate how to implement the two ideas.