basic computer. (DRLD, DRINR, and DRCLR) Table 5-6 (Mano, pi59) R'TO AR - PC R'TI: IR - MEAR), PC - PC. 1 R'T2: DO, D1... D7 - Decode IR(12-14), Fetch Decode AR - IR(O-11), I - IR(15) AR - MEAR) Indirect D7'IT3: Menory Reference AND DR - M(ARIA AC <-AC DR - MTART AC - AC. PpR. E - Cout, sc - 0 DR - MEAR) AC - DR, Sc - 0 MCAR) - AC, sc - 0 PC - AR, SC - 0 MEAR) - PC, AR - AR. 1 PC <- AR, SC <-0 DR - MLAR) DR - DR +1 DOTS: DIT4: DITS: DN. SC <- 0 ADD LDA D3T4: STA BUN BSA D4T4: DST4: D6TS: ISZ DETE: DETS: DET6: MLART- DR, if (DR-0) then (PC - PC+ 1), Sc<-0 Register-reference: D7I'T3 -r (common to all register-reference instructions) IR(1) - Bi (1-0, 1, 2, . 11) r: SC - 0 r811: AC -0 CLA CLE rB10: E <- O CHA r89: AC - NOT (AC) rB8: E - NOT (E) rB7: AC - shr AC, AC(15) - E, E <- AC(O) rB6: AC <- shl AC, AC(0) - E, E <- AC(15) rB5: AC - AC+1 If (AC(15) 0) then (PC - PC . 1) CHE CIR CIL INC SPA rB4: SNA rB3: If (AC(15) 1) then (PC <- PC 1) r82: rB1: If (E- 0) then (PC - PC + 1) r80: S <- 0 SZA If (AC- 0) then (PC <- PC+ 1) SZE HLT Input-output : D7IT3 - P (common to all input-output instructions) IR(1) - B1 (1 - 6, 7, 8, 9, 10, 11) p: SC - 0 p811: AC(O-7) INPR, FGI - 0 p810: OUTR <- AC(0-7), FGO - 0 p89: p88: INP OUT SKI If (FGI - 1) then (PC <- PC• 1) If (FGO - 1) then (PC <- PC • 1) p87: pB6: SKO ION IEN <- 1 IOF IEN <- 0
basic computer. (DRLD, DRINR, and DRCLR) Table 5-6 (Mano, pi59) R'TO AR - PC R'TI: IR - MEAR), PC - PC. 1 R'T2: DO, D1... D7 - Decode IR(12-14), Fetch Decode AR - IR(O-11), I - IR(15) AR - MEAR) Indirect D7'IT3: Menory Reference AND DR - M(ARIA AC <-AC DR - MTART AC - AC. PpR. E - Cout, sc - 0 DR - MEAR) AC - DR, Sc - 0 MCAR) - AC, sc - 0 PC - AR, SC - 0 MEAR) - PC, AR - AR. 1 PC <- AR, SC <-0 DR - MLAR) DR - DR +1 DOTS: DIT4: DITS: DN. SC <- 0 ADD LDA D3T4: STA BUN BSA D4T4: DST4: D6TS: ISZ DETE: DETS: DET6: MLART- DR, if (DR-0) then (PC - PC+ 1), Sc<-0 Register-reference: D7I'T3 -r (common to all register-reference instructions) IR(1) - Bi (1-0, 1, 2, . 11) r: SC - 0 r811: AC -0 CLA CLE rB10: E <- O CHA r89: AC - NOT (AC) rB8: E - NOT (E) rB7: AC - shr AC, AC(15) - E, E <- AC(O) rB6: AC <- shl AC, AC(0) - E, E <- AC(15) rB5: AC - AC+1 If (AC(15) 0) then (PC - PC . 1) CHE CIR CIL INC SPA rB4: SNA rB3: If (AC(15) 1) then (PC <- PC 1) r82: rB1: If (E- 0) then (PC - PC + 1) r80: S <- 0 SZA If (AC- 0) then (PC <- PC+ 1) SZE HLT Input-output : D7IT3 - P (common to all input-output instructions) IR(1) - B1 (1 - 6, 7, 8, 9, 10, 11) p: SC - 0 p811: AC(O-7) INPR, FGI - 0 p810: OUTR <- AC(0-7), FGO - 0 p89: p88: INP OUT SKI If (FGI - 1) then (PC <- PC• 1) If (FGO - 1) then (PC <- PC • 1) p87: pB6: SKO ION IEN <- 1 IOF IEN <- 0
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question
![1. Similar to the book, page 171, derive the control gates associated with the register DR in the
basic computer. (DRLD, DRINR, and DRCLR)
Table 5-6 (Mano, pi59)
Fetch
R'TO: AR - PC
IR - MLAR], PC <- PC + 1
DO, D1, ... D7 <- Decode IR(12-14),
AR <- IR(O-11), I <- IR(15)
AR <- MCAR]
R'T1:
Decode
R'T2:
Indirect
D7'IT3:
Menory Reference:
AND
sOT DR - M(ARIA
AC <- AC DR. SC <-0
DUTS:
DIT4:
DIT5:
ADD
DR - MEARTA
AC <- AC + DR. E <- Cout, SC <-0
DZT4: )
DR <- MLAR)
LDA
DZTS: AC <- DR, SC - o
MCAR) <- AC, sc <- 0
PC <- AR, SC <-0
STA
D3T4:
BUN
D4T4:
DST4:
M(AR) <- PC, AR <- AR+ 1
BSA
PC <- AR, SC<- 0
DET4: DR <- MLAR)
DSTS:
ISZ
DET5:
DR <- DR + 1
DET6: MLAR) - DR, if (DR-0) then (PC <- PC + 1), sc<-0
Register-reference:
D7I'T3 -r (common to all register-reference instructions)
IR(1) - Bi (1 - 0, 1, 2, ..., 11)
r: SC <- 0
rB11: AC (- 0
CLA
CLE
IB10: E <- 0
AC <- NOT (AC)
E - NOT (E)
AC <- ahr AC, AC(15) <- E, E <- AC(o)
CHA
rB9:
CME
rB8:
CIR
rB7:
AC <- mhl AC, AC(0) <- E, E <- AC(15)
AC <- AC + 1
CIL
rB6:
rB5:
rB4:
INC
If (AC(15) - 0) then (PC <- PC + 1)
If (AC(15)-1) then (PC <- PC + 1)
If (AC - 0) then (PC <- PC + 1)
If (E - 0) then (PC <- PC + 1)
S <- 0
SPA
SNA
rB3:
SZA
rB2:
SZE
rB1:
rB0:
HLT
Input-out put :
D7IT3 - P (common to all input -output instructi ons)
IR(1) - Bi (1- 6, 7, 8, 9, 10, 11)
p: SC <- 0
PB11: AC(0-7) <- INPR, FGI <- 0
PB10: OUTR <- AC(0-7), FGO <- 0
p89: If (FGI - 1) then (PC <- PC + 1)
If (FGO - 1) then (PC <- PC + 1)
INP
OUT
SKI
p8:
pB7: IEN <- 1
pB6:
SKO
ION
IOF
IEN <- 0](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc353cc0f-0c4d-4d5b-a3e6-e746dbb90f94%2F9270d122-5b9e-4da6-a61f-5f34fc2435fd%2F48hjlv_processed.jpeg&w=3840&q=75)
Transcribed Image Text:1. Similar to the book, page 171, derive the control gates associated with the register DR in the
basic computer. (DRLD, DRINR, and DRCLR)
Table 5-6 (Mano, pi59)
Fetch
R'TO: AR - PC
IR - MLAR], PC <- PC + 1
DO, D1, ... D7 <- Decode IR(12-14),
AR <- IR(O-11), I <- IR(15)
AR <- MCAR]
R'T1:
Decode
R'T2:
Indirect
D7'IT3:
Menory Reference:
AND
sOT DR - M(ARIA
AC <- AC DR. SC <-0
DUTS:
DIT4:
DIT5:
ADD
DR - MEARTA
AC <- AC + DR. E <- Cout, SC <-0
DZT4: )
DR <- MLAR)
LDA
DZTS: AC <- DR, SC - o
MCAR) <- AC, sc <- 0
PC <- AR, SC <-0
STA
D3T4:
BUN
D4T4:
DST4:
M(AR) <- PC, AR <- AR+ 1
BSA
PC <- AR, SC<- 0
DET4: DR <- MLAR)
DSTS:
ISZ
DET5:
DR <- DR + 1
DET6: MLAR) - DR, if (DR-0) then (PC <- PC + 1), sc<-0
Register-reference:
D7I'T3 -r (common to all register-reference instructions)
IR(1) - Bi (1 - 0, 1, 2, ..., 11)
r: SC <- 0
rB11: AC (- 0
CLA
CLE
IB10: E <- 0
AC <- NOT (AC)
E - NOT (E)
AC <- ahr AC, AC(15) <- E, E <- AC(o)
CHA
rB9:
CME
rB8:
CIR
rB7:
AC <- mhl AC, AC(0) <- E, E <- AC(15)
AC <- AC + 1
CIL
rB6:
rB5:
rB4:
INC
If (AC(15) - 0) then (PC <- PC + 1)
If (AC(15)-1) then (PC <- PC + 1)
If (AC - 0) then (PC <- PC + 1)
If (E - 0) then (PC <- PC + 1)
S <- 0
SPA
SNA
rB3:
SZA
rB2:
SZE
rB1:
rB0:
HLT
Input-out put :
D7IT3 - P (common to all input -output instructi ons)
IR(1) - Bi (1- 6, 7, 8, 9, 10, 11)
p: SC <- 0
PB11: AC(0-7) <- INPR, FGI <- 0
PB10: OUTR <- AC(0-7), FGO <- 0
p89: If (FGI - 1) then (PC <- PC + 1)
If (FGO - 1) then (PC <- PC + 1)
INP
OUT
SKI
p8:
pB7: IEN <- 1
pB6:
SKO
ION
IOF
IEN <- 0
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