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计算机组成与设计软硬件接口课后答案

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计算机组成与设计软硬件接口答案有一些模糊,pdf的,Hennessy的~~

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Solution* for Chapter 1 Exercise*

Solutions for Chapter 1 Exercises

1.1

CPU

1.2 1, abstraction

1.3

bit

1.4 8, computer family

1.5 19, memory

1.6 10, datapath

1.7 9, control

1.8 11, desktop (personal computer)

1.9 15, embedded system

1.10 22, server

1.11

18,

LAN

1.12

27,

WAN

1.13 23, supercomputer

1.14 14, DRAM

1.15 13, defect

1.16 6, chip

1.17 24, transistor

1.18

12,

DVD

1.19 28, yield

1.20 2, assembler

1.21 20, operating system

1.22 7, compiler

1.23 25, VLSI

1.24 16, instruction

1.25 4, cache •

1.26 17, instruction set architecture

Solutions for Chapter 1 Exercises

1.27 21, semiconductor

1.28 26, wafer

1.29 i

1.30 b

1.31 e

1.32 i

1.33 h

1.34 d

1.35 f

1.36 b

1.37 c

1.38 f

1.39

1.40 a

1.41 c

1.42 i

1.43 e

1.44 g

1.45 a

1.46 Magnetic disk:

Time for 1/2 revolution =1/2 rev x 1/7200 minutes/rev X 60 seconds/

minutes

4.17 ms

Time for 1/2 revolution = 1/2 rev x 1/10,000 minutes/rev X 60 seconds/

minutes = 3 ms

Bytes on center circle = 1.35 MB/seconds X 1/1600 minutes/rev x 60

seconds/minutes = 50.6 KB

Bytes on outside circle = 1.35 MB/seconds X 1/570 minutes/rev X 60

seconds/minutes = 142.1 KB

1.48 Total requests bandwidth = 30 requests/sec X 512 Kbit/request = 15,360

Kbit/sec < 100 Mbit/sec. Therefore, a 100 Mbit Ethernet link will be sufficient.

Solution* for Chapter X Exarclsm

1.49 Possible solutions:

Ethernet, IEEE 802.3, twisted pair cable, 10/100 Mbit

Wireless Ethernet, IEEE 802.1 lb, no medium, 11 Mbit

Dialup, phone lines, 56 Kbps

ADSL, phone lines, 1.5 Mbps

Cable modem, cable, 2 Mbps

1.50

a. Propagation delay = mis sec

Transmission time = LIR sec

End-to-end delay =m/s+L/R

b. End-to-end delay =mls+ LJR+t

c. End-to-end delay = mis + 2I/R + f/2

1.51 Cost per die = Cost per wafer/(Dies per wafer x Yield) = 6000/( 1500 x 50%)

= 8

Cost per chip = (Cost per die + Cost_packaging + Cost_testing)/Test yield =

(8 + 10)/90% = 20

Price = Cost per chip x (1 + 40%) - 28

If we need to sell n chips, then 500,000 + 20« = 28», n = 62,500.

1.52 CISCtime = Px8r=8Prns

RISC time = 2Px 2T= 4 PTns

RISC time = CISC time/2, so the RISC architecture has better performance.

1.53 Using a Hub:

Bandwidth that the other four computers consume = 2 Mbps x 4 = 8 Mbps

Bandwidth left for you = 10 - 8 = 2 Mbps

Time needed = (10 MB x 8 bits/byte) / 2 Mbps = 40 seconds

Using a Switch:

Bandwidth that the other four computers consume = 2 Mbps x 4 = 8 Mbps

Bandwidth left for you = 10 Mbps. The communication between the other

computers will not disturb you!

Time needed = (10 MB x 8 bits/byte)/10 Mbps = 8 seconds

Solutions for Chapter 1

EXWCIMS

1.54 To calculate d = axfc-axc, the CPU will perform 2 multiplications and 1

subtraction.

Time needed =10x2+1x1=21 nanoseconds.

We can simply rewrite the equation &sd = axb-axc= ax (b-c). Then 1 multi-

plication and 1 subtraction will be performed.

Time needed =10x1 + 1x1 = 11 nanoseconds.

1.55 No solution provided.

1.56 No solution provided.

1.57 No solution provided.

1.68 Performance characteristics:

Network address

Bandwidth (how fast can data be transferred?)

Latency (time between a request/response pair)

Max transmission unit (the maximum number of data that can be transmit-

ted in one shot)

Functions the interface provides:

Send data

Receive data

Status report (whether the cable is connected, etc?)

1.69 We can write Dies per wafer = /((Die area)"

) and Yield = /((Die area)"

)

and thus Cost per die = /((Die area)

1.60 No solution provided.

1.61 From the caption in Figure 1.15, we have 165 dies at 100% yield. If the defect

density is 1 per square centimeter, then the yield is approximated by

1 +

.198.

Thus, 165 x .198 = 32 dies with a cost of $1000/32 = $31.25 per die.

Solution* for Chapter 1 Exercises

1.62 Defects per area.

Yield =

(1 + Defects per area x Die area/2)

Defects per area = —

j —

••— - 1 |

1980

1992

1992 + 19S0

Die ares

Yield

Defect density

Die area

Yield

Defect density

improvement

0.16

0.48

5.54

0.97

0.48

0.91

6.09

剩余122页未读，继续阅读

yuhuotianxing

2014-04-16

课后题答案，就是讲的不太详细，步骤还是要自己琢磨啊

McWings

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