give the 9-bit microoperation field for the following micro- operations:a. AC←AC + 1, DR←DR + 1b. PC←PC + 1, DR←M[AR]c. DR←AC, AC←DR TABLE 7-1 Symbols and Binary Code for Microinstruction FieldsF1MicrooperationSymbol00NoneNOPADDCLRAC001AC-AC + DR010AC+011AC+AC + 1INCAC100AC+DRAR -DR(0–10)DRTAC101DRTAR110AR -PCPCTAR111M[AR]-DRWRITEF2MicrooperationSymbol000NoneNOP001AC+AC - DRSUBAC+AC V DRAC+AC A DRDRM[AR]DR +AC010ORANDREADАCTDR011100101110DR +DR + 1INCDR111DR(0-10) – PCРCTDRF3MicrooperationSymbol000NoneNOPAC+ACO DRAC+AC001XOR010COM11AC+shl ACSHL100AC+shr ACSHR! 101110111РC- РC + 1INCPCPC+ARARTPCReservedCDConditionSymbolComments00Always = 1DR(15)AC(15)UUnconditional branch01IIndirect address bitSign bit of ACZero value in AC1011AC = 0BRSymbolFunction00JMPCAR +AD if condition = 1CAR +CAR + 1 if condition = 0CAR +AD, SBR +CAR + 1 if condition = 1CAR +CAR + 1 if condition = 0CAR +SBR (Return from subroutine)CAR(2-5) -DR(11-14), CAR(0,1,6) –001CALL10RET11МАР

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Answered: give the 9-bit microoperation field for…

give the 9-bit microoperation field for the following micro- operations: a. AC←AC + 1, DR←DR + 1 b. PC←PC + 1, DR←M[AR] c. DR←AC, AC←DR

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Question

give the 9-bit microoperation field for the following micro- operations:

a. AC←AC + 1, DR←DR + 1

b. PC←PC + 1, DR←M[AR]

c. DR←AC, AC←DR

TABLE 7-1 Symbols and Binary Code for Microinstruction Fields
F1
Microoperation
Symbol
00
None
NOP
ADD
CLRAC
001
AC-AC + DR
010
AC+0
11
AC+AC + 1
INCAC
100
AC+DR
AR -DR(0–10)
DRTAC
101
DRTAR
110
AR -PC
PCTAR
111
M[AR]-DR
WRITE
F2
Microoperation
Symbol
000
None
NOP
001
AC+AC - DR
SUB
AC+AC V DR
AC+AC A DR
DRM[AR]
DR +AC
010
OR
AND
READ
АCTDR
011
100
101
110
DR +DR + 1
INCDR
111
DR(0-10) – PC
РCTDR
F3
Microoperation
Symbol
000
None
NOP
AC+ACO DR
AC+AC
001
XOR
010
COM
11
AC+shl AC
SHL
100
AC+shr AC
SHR
! 101
110
111
РC- РC + 1
INCPC
PC+AR
ARTPC
Reserved
CD
Condition
Symbol
Comments
00
Always = 1
DR(15)
AC(15)
U
Unconditional branch
01
I
Indirect address bit
Sign bit of AC
Zero value in AC
10
11
AC = 0
BR
Symbol
Function
00
JMP
CAR +AD if condition = 1
CAR +CAR + 1 if condition = 0
CAR +AD, SBR +CAR + 1 if condition = 1
CAR +CAR + 1 if condition = 0
CAR +SBR (Return from subroutine)
CAR(2-5) -DR(11-14), CAR(0,1,6) –0
01
CALL
10
RET
11
МАР

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