Microcode reading control system

U.S. Patent Jun. 12,1990

Sheet 4 of 8

4,933,841

Fig. 4A

TIME T1 T2 T3 T4
INST. 1 |. P" . A11 , En ,

r , D 21, A21, M21, E21 ,

tMC.-r 0J , D22 1 A22, M22, E22 ,

1Nb,-^1 , D23, A23 , M23, E23 ,

f , D31 , A31 , M 31 , E 31

INST. 3j ■ D32, A 32, M32, E 32

INST. 4/ , D41 , A4T, M41

TIME

INST. B
(BRANCH INST.)

INST. 2 |

INST. 3 |

INST, t /
(BRANCH TARGET INSTjl

INST. REG. 4
INST. REG. 3

SELECTOR 52

ADD. REG. 71

CO NT. REG. II
ADD. REG. 70
CONT REG. 2
MICROCODE REG.A60
MICROCODE REG. MSI
MICROCODE REG. E62