ADDRESS OF OPERAND 2 - DOS!VSE Handbook

Rxl Op Code

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R 1

I

B2 D2

REGISTER REGISTER ADDRESS OF 1

0 71B 1112 15 116 1920 OPERAND 1 OPERAND 3 OPERAND 2

I I

RS I Op Code

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IMMEDIATE ADDRESS OF

0 718 1112 15116 1920

OPERAND OPERAND 1

SI I Op Code

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¹²

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^Bl

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^Dl

[

0 78 15[16 1920

ADDRESS OF OPERAND 1

lop

^Code

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^Bl ^Dl

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15 116 1920

LENGTH LENGTH ADDRESS OF OPERfND 1 OPER~ND 2 OPERAND 1 SS I Op Code

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L2/13

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B I O I

0 718 11 12 15 116 1920 ADDRESS OF

LENGTH OPERAND 1

SS I Op Code

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B 1

I

o

7 B 15 16 1920

1-12

THIRD HALFWORD 3

ADDRESS OF OPERAND 2

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D2 31132 35 36

ADDRESS OF OPERAND 2

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^B2

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D2 31 32 3536

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)

CONTROL REGISTER ALLOCATION

0 1 2 3

SYSTEM CONTR

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TRANSL CONTR LEXTERNAL INTERRUPTION MASKS SEGM TBL LENGTH

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SEGMENT TABLE ORIGIN ADDRESS

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CHANNEL MASKS

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MONITOR MASKS

ASSIGNMENT OF CONTROL REGISTER FIELDS

CR Bits Name of Field 0 0 Block-Multiplexing Control 0 1 SSM-Suppression Control

9 0 Successful-Branching-Event Mask 9 1 Instruction-Fetching-Event Mask 9 2 Storage-Alternation-Event Mask 9 3 GR-Alternation-Event Mask 9 16-31 PER* General-Register Masks 14 5 Degradation-Report Mask 14 6 External-Damage-Report Mask 14 7 Warning Mask

Associated with Block·Multiplexing Channels SET System Mask Dynamic Addr. Translation Dynamic Addr. Translation Dynamic Addr. Translation Clock Comparator CPU Timer Interval Timer I nterrupt Key External Signal Channels Monitor Call Program-Event Recording Program-Event Recording Program-Event Recording Program-Event-Recording Program-Event-Recording Program-Event Recording Program-Event Recording Machine Check Handling Machine Check Handling Machine Check Handling Machine-Check Handling Machine-Cheek Handling Machine-Check Handling Machine-Cheek Handling Machine-Cheek-Handling

PERMANENT MAIN STORAGE ASSIGNMENT Storage Lac

Byte Byte

I

^Byte

I

^Byte

Hex Dec

0 0 Restart New PSW (lPL PSW)

4 4

8 8 Restart Old PSW (lPL CCWll

C 12

10 16 IIPL CCW21

14 20

18 24 External Old PSW lC 28

20 32 Supervisor Call Old PSW 24 36

28 40 Program Old PSW 2C 44

30 48 Machine Check Old PSW 34 52

38 56 Input/Output Old PSW 3C 60

40 64 Channel Status Word 44 68

48 72 Channel Address Word 4C 76

50 80 Interval Timer 54 84

58 88 External New PSW 5C 92

60 96 Supervisor Call New PSW 64 100

68 104 Program New PSW 6C 108

70 112 Machine Check New PSW 74 116

78 120 Input/Output New PSW 7C 124

80 128

84 132

o

0 0 0 0 0 0 0 0 0 0 0 0 0 0

01

External Interruption Code 88 136 00 0 0

a

0 0 0 0 0 0 0

o]ILclolsvc

Interruption Code 8C 140

a a

0 0 0 0 0

a

0 0 0 0 alllelO/Program Interruption Code 90 144 0 0 0 0 0 0 0 0 ACCESS Exception Address

94 148 0 0 0 0 0 0 0 0 Monitor Class # [PER Code [ 0 0 0 0 0 0 0 0 0 0 0 0 98 152 0 0 0 0 0 0 0 0 PER Address

9C 156 0 0 0 0 0 0 0 0 Monitor Code AO 160

A4 164 A8 168 Channel ID AC 172 Reserved

1-14

PERMANENT MAIN STORAGE ASSIGNMENT I ••• Cont'd) Storage.Lac

Byte

I

^Byte

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^.Byte

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^Byte

.Hex Dec

BO 176 Limited Chan~el Logout B4 180

B8 184 100 00 0 OOOlliDAddress

1ye

^Zero^ifan 1/0 Address is stored here ^I

I

I .

212

08 216 CPU-Timer Save Area DC 220

EO 224 Clack-Comparator Save Area E4 228

E8 232 Machine Check Interruption Code EC 236

FO 240 F4 244

F8 248

o

0 0 0 0 0 0 0

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Failing Storage Address F9 292 Aeserved

Hie

348

160 352 Floating Point Register Save Area

1 I

I I I I 17C 360

180 364 General Register Save Area

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lBC 444

lCO 448 Control Register Save Area

1 I

I I

1 I

lFC 508

)

1·15

PROGRAM STATUS WORD (EC·model I/O interrupt mask External interrupt mask KEY

Always one in EC mode Machine check mask Wait state

Fixed-point overflow mask Decimal overflow mask Exponent underflow mask Significance mask

*Alwayszero

*Alwayszera Instruction address.

*If not zero a Specification Exeption is recognized

**Only used in /370 mode PROGRAM STATUS WORD (BC-mode)

32 34 36 40 Channell mask Channel 2 mask Channel 3 mask Channel 4 mask Channel 5 mask Mask for channel 6 and up External interrupt mask Protection key Always

a

in BC mode Machine check mask

INTERRUPTION CODE

INSTRUCTION ADDRESS

Bit Description

14 Wait state

15 Problem state

16-31 Interruption code 32·33 I nstruction length code 34-35 Condition code 36}

{F;Xed.po;nt o",flow mask 37 Prog. Decimal overflow mask 38 mask Exponent underflow mask 39 Significance mask 40·63 I nstruction address

1·16

CHANNEL ADDRESS WORD ICAW} IX'48'}

3 4 7 B 15 16 23 24

K,y

I

0 0 0 0

!

Command Address

CHANNEL COMMAND WORD ICCW}

7 B 15 16 23 24

Command Code Data Address

32 37 38 40 47 4B 55 56

Flags Ignored Byte Count

Flags Bit Description

32 CD-bit (80) : causes use of address portion of next CCW 33 CC-bit (40)

34 SLI-bit (20) 35 Skip bit (10) 36 PCIM lOB}

37 IDA-bit (04)

: cuases use of command code and data address of next CCW : causes suppression of possible incorrect length indication : suppresses transfer of information to main storage : causes a channel Program Controlled Interruption : specifies indirect data addressing (only /370 mode) CHANNEL STATUS WORD ICSW} IX'40'}

o

3 4 5 6 7 8 1516 2324

!

^K,y

H+c!

Command Address

32 39 40 47 48 55 56

Byte Count

Status

Bit Description Bit Description

5 Logout pending 40 10080) Program controlled interruption 6,7 Deferred condo code 41 10040} Incorrect length

32 IBOOO} Attention 42 10020) Program check 33 (4000) Status Modifier 43 10010} Protection check 34 12000} Control unit end 44 10008) Channel data check 35 11000) Busy 45 10004) Channe~ control check 36 10BOO) Channel end 46 10002) I nterface control check 37 10400} Device end 47 10001) Chaining check 38 10200) Unit check

39 10100) Unit exception

Byte count: Bits 4B-63 form the residual count for the last CCW used.

1-17

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LIMITED CHANNEL LOGOUT IX'BO')

Detect Bit Description

CPU Channel Storage control Storage

Field Validity Flags Bit Description 19 Sequence code 20 Unit status 21 CCW address and key 22 Channel address 23 Device address

Source Bit Description 8 CPU 9 Channel 10 Storage control 11 Storage 12 Control unit TT (Type of termination) Bit Description 24-25

Interface disconnect Stop, stack or normal Selective reset Reserved A (bit 28): I/O error alert Seq (bits 29·31): Sequence code MACHINE CHECK INTERRUPTION CODE IX'ES')

8 9 1516 181920

32 3940

0 0 0 0 0 0 0 0 0 0 0 0 0 0 Me Conditions

Bit Description System damage Instr. proc'g damage System recovery Bit Description 20 PSW bits 12·15 21 PSW masks and key 22 Program mask and condo code 23 Instruction address 24 Failing storage address 25 Region code

Bit Description 15 Delayed Stg error Bit Description 16 Storage error uncorrected 18 Storage-key error uncorrected

Bit Description 27 Floating·point registers 28 General registers 29 Control registers 30 CPU exten~ed logout 31 Storage logical 46 CPU Timer 47 Clock comparator

1-18

CODES FOR PROGRAM INTERRUPTION IX'BE')

Interruption Program Interruption Interruption Program Interruption

Code Cause Code Cause

Dec Hex Dec Hex

1 0001 Operation 12 OOOC Exponent overflow

2 0002 Privileged operation 13 0000 Exponent underflow

3 0003 Execute 14 OOOE Significance

4 0004 Protection 15 OOOF Floating point divide

5 0005 Addressing 16 0010 Segment translation*

6 0006 Specification 17 0011 Page translation*

7 0007 Data 18 0012 Translation specification*

8 0008 Fixed-point overflow 19 0013 Special operation 9 0009 Fixed-point divide 24 0018 Page access

CODES FOR EXTERNAL INTERRUPTlONS IX'86') Interruption Code External Interruption

(Hex) Cause

Indication of Concurrent Condition by Bit Positions 0080 Interval timer

0040 Interrupt key 0020 External signal 2 1004 Clock comparator

1005 CPU timer

CODES FOR INPUT/OUTPUT INTERRUPTIONS IX'BA') Interruption Code I nput/Output Interruption

(Hex) Cause

CODES FOR SUPERVISOR CALL INTERRUPTIONS IX'SA') Supervisor Call Interruption

Cause

Instruction (OA) Note: r = R 1 and R2 field of SUPERVISOR CALL

Dans le document DOS!VSE Handbook (Page 22-29)