1. (1) (2)

2.

1.1 2 3

41. (1)

2. 1JCL

2 I/O

3

2. ()

3. 1JCBJob Control Block

2

3. (1)

JCB3. (2)

3

3. (3)

4

3. (4)

53. (5)

6JCB 3. (6)

4.

4. (1)

1

4. (2)

5. JCB

JCB

1

SPOOLing5. (1)

CPU5. (2)

2JCBJCB

JCB

JCB JCB5. (3)

6.

1 I/O6. (1)

6. (2)

Si Ei Ti Ei Si

T n26. (3)

W ri i T W 6. (4)

3

CPUCML6. (5)

4FCFSFirst Come First Serve

SJFShortest Job First

HRNHighest Response Ratio Next R = / =+/ = 1 + / 6. (6)

HPFHighest Priority First

a JCB

b

= + 6. (7)

51

6. (11)

6. (12)

JOB1

800

120

800

1000

120

1

JOB2

850

50

1000

1050

120

2.4

JOB3

900

10

1050

1100

120

12

JOB4

950

20

1100

1120

90

4.5

T = 112.5

W = 4.975

450

19.9

6. (13)

JOB1

800

120

800

1000

120

1

JOB2

850

50

1030

1120

150

3

JOB3

900

10

1000

1010

70

7

JOB4

950

20

1010

1030

40

2

T = 95

W = 3.25

380

13

6. (14)

JOB1

800

120

800

1000

120

1

JOB2

850

30

1010

1100

70

1.4

JOB3

900

10

1000

1010

70

7

JOB4

950

20

1100

1120

90

4.5

T = 87.5

W = 4.075

350

16.3

626. (15)

6. (16)

JOB1

1000

30

1000

1105

65

4.167

JOB2

1005

20

1005

1025

20

1

JOB3

1010

5

1025

1030

20

4

JOB4

1020

10

1030

1040

20

2

T = 31.25

W = 2.79

125

11.167

1

JOB11000100510401105JOB210051025JOB310251030JOB410301040

6. (17)

1000JOB1JOB11005JOB2 JOB2JOB220JOB11005JOB125JOB2JOB16. (18)

11010JOB3 JOB31020JOB41025JOB2JOB1 JOB3JOB4JOB3JOB1JOB3JOB3JOB3JOB3JOB4JOB4JOB16. (19)

7

6. (20)

8. , 123JCB45

9.

10. SPOOLingSimultaneous Peripheral Operations On-Line

10. SPOOLing(1)

10. SPOOLing2

CPUCPU

SPOOLing10. SPOOLing(3)

1. 1

1. (1)

2/

I/O

I/O1. (2)

1. (3)

2. a bCC

3. aOS OS/MVTVAX/VMSbOS RT-11CP/Mc UNIX (d) UNIX

4. 1loginlogout2345

4. 1 shellls -a -l"gunzip mp1.tar.gz; tar -xvf mp1.tar; \rm -r -f mp1.tar"/ (option/switch)(argument)UNIX cp -r doc /tmpargv[0], argv[1], .../tmp

4. 2shellDOScopyDOSxcopy

(?, *)UNIXcp"1.tar""2.tar""cp *.tar /tmp""cp 1.tar /tmp; cp 2.tar /tmp"

4. 3 1 234

5

51234567

6. OS

6. (1)

(1)

6. (2)

(2) LOGON

6. (3)

(3)

6. (4)

(4) LOGOFF

6. (5)

7. GUI

. 1.

I/O

1.(1)

-15 1DOS MOVE A, PARA1 MOVE B, PARA2 INT 21H1.(2)

-2 2OUT L1MOVE AI IN ADDR1B OR BBS JNC L1 OUT ADDR2A RET1.(3)

I/OI/OI/O1.(4)

-3 2 MOVE DXOFFSETBUFF MOVE CXBYTE MOVE BXHANDLE MOVE AH3FH INT 21H1.(5)

-4

: A B1.(6)

-5 5 char buff[4]=abcde;

for(i=4;i>=0;i--) print(buff[i]);

f11020 seek(fd,10,0); read(fd,buff,11);

1.(7)

11.(8)

1.(9)

1.(10)

2. OS OS

2. 1TRAP0123

2. 2,

read (fd, buffer, nbytes)

3.

OS:

4. INTINT

OS4.1

4.3

CALLCALLCALLPCRETPCinttrapcall jmp 4.4

CALL

a. 12OS4.5

b. ,

OS 4.6

4.7

OS

CALLCALL4.8

c. INTIRET PSW INTPSW PSW

IRETPSW4.9

1

INTIRET

4.10

5. Win32 Windows(Win32 API) OSWin95 WindowsWin32 APIWindowsWindowsWindowsWindows

.

1.

bootup

download

1. (1)1

OSOS

12345OSOSOS6

1. (2)

2OS

OSOS1. (3)

2.

12 3

1OSOS2PCB33.

45PCB NULL 3. 1

4. 1 OSOS234PCB

4. 15OS6 7