PERMANENT STORAGE ASSIGNMENTS Dec Hex Length Purpose 0 0 double word I nitial program loading PSW 8 8 double word Initial program loading CCW1
16 10 double word Initial program loading CCW2
24 18 double word External old PSW 32 20 double word Supervisor Call old PSW 40 28 double word Program old PSW 48 30 double word Machine-check old PSW 56 38 double word Input/output old PSW
64 40 double word Channel status word
72 48 word Channel address word
76 4C word Unused 80 50 word Timer (uses bytes 50, 51 & 52)
84 54 word Unused
88 58 double word External new PSW
96 60 double word Supervisor Call new PSW 104 68 double word Program new PSW
112 70 double word Machine-check new PSW 120 78 double word Input/output new PSW 128 80 ( 1) Diagnostic scan-out area
(1) The size of the diagnostic scan-out area depends on the particular model and I/O channels, for models 30 through 75, maximum size is 256 bytes.
CHANNE L COMMANDS 2314,2311/2321DASD Source: GA26-3599, GA26·5988 Command for CCW:j: Count MT Off MTOnt Control Seek 6 07 Seek Cylinder 6 OS Seek Head 6 18
Set File Mask 1 1F Space Count 3 OF Recalibrate (Note 1) Not zero 13
Restore (2321 only) Not zero 17 Sense Sense I/O 6 04 Release Devi.ce }(Note 2) 6 94
Reserve DeVice 6 84 Search Home Address EO 4 (usually) 39 89 Identifier EO 5 (usually) 31 81 Identifier HI 5 (usually) 51 01 Identifier EO or HI 5 (usually) 71 F1
Key EO 1 to 255 29 A9
Key HI 1 to 255 49 C9
Key EO or HI 1 to 255 69 E9
Key & Data EO 2D AD
Key & Data HI Number 4D CD
Key & Data EO or HI of bytes 6D ED
Continue Search EO in search
25 A5 Scan Search HI argument,
45 C5 Search HI or EO including
65 E5 Set Status Modifier*
mask bytes.
35 85
Set Status Modifier* (Special 75 F5
No Status Modifier
feature.)
55 05 Read Home Address 5 1A 9A
Count 8 12 92
Record 0 16 96
Data
}
Number 06 86
Key & Data of bytes OE 8E
Count, Key & Data transferred 1E 9E IPL 02 Writ., Home Address 5 (usually) 19
Record 0 8+KL+DL of RO 15
Count, Key & Data 8+KL+DL 10 Special Count, Key & Data 8+KL+DL 01 Data DL 05 Key & Data KL+DL OD
Erase 8+KL+DL 11
1. For 2311 or 2314 only. *Sense byte determines command used.
2. Two-c:hannel switch requ ired except tCode same as MT Off except as listed. for a 2314/2844 combination. :j:See also standard commands, panel 10.

CHANNEL COMMANDS (Contd) @ Standard Command Code Assignments (CCW bits 0-7) for 1/0 Operations xxxx 0000 Invalid tttt tt01 Write
tttt 0100 Sense tttt tt10 Read
xxx x 1000 Transfer in Channel tttt tt11 Control
tttt 1100 Read Backward 0000 0011 Control No Operation
x-Bit ignored. tModifier bit for specific type of I/O device 1052 CONSOLE Source: GA22-6877
Read Inquiry BCD OA Sense 04 OS Write BCD, Auto Carrier Return
Write BCD, No Carrier Return 09 Alarm 01 2540 CARD READ PUNCH Source: GA24-3312
Command
Read, Feed, Select Stacker Read
Type
AA
AB
Code SSDO 0010 1100 0010 1101 0010 SS10 0011 SSDO 1001 SSDO 0001 0000 0100 Bit Meanings SS Stacker OOR10rP1 01 R20rf»2 10 RP3 Read, Feed (1400 Compatibility-)
Feed, Select Stacker PFR* Write. Feed. Select Stacker Write, Feed, Select Stacker Sense 1442-N1 CARD READ PUNCH
Write 01 Write, Select Stacker 2 41
Write, Feed 81
Write, Feed, Select Stacker 2 C1
Write Card Image- 21
Write Card Image, Sel Stkr 2 61
Write Card Image, Feed A 1
Write Card Image, Feed, Sel Stkr 2 E 1 Sense 04 1403.1443 PRINTERS After Write
89 Skip to Channel 1 Skip to Channel 2 Skip to Channel 3 Skip to Channel 4 Skip to Channel 5 Skip to Channel 6 Skip to Channel 7 Skip to Channel 8 Skip to. Channel 9 Skip to Channel 10 Skip to Channel 11 Skip to Channel 12
91
99
A1
A9
B1
B9
C1
C9 01 09 E1
Immed
8B
93
9B
A3
AB
B3 BS C3
CB 03 DB
E3 2400-SERIES MAGNETIC TAPE BA
BA
BB
Q Data Mode
o 1-EBCDIC 1 2-Col. binary- Source: GA21-9025
Read
Read, Select Stacker 2
Read Card Image Read Card Image, Sel Stkr 2
Read 1442 Compatibility­
Read 1442 Compat, Sel Stkr 2
Control Feed
Control Feed, Select Stkr 2
Control Select Stacker 2 02 42
22
62
12
52
83
C3
43
Source: GA24-3312, GA24-3120
j
Diagnostic Data Read 02 Diagnostic Check Read 06 UCS Gate- EB 1403 UCS Load (No Folding)- FS only lJCS Load (Folding)- F3
B lock Data Check - 73
Reset Block Data Check- 7B
Write without Spacing 01 Sense 04 Space 1 Line Space 2 Lines Space 3 Lines
After Write 09 11
19
Immed
OS
13
1B
Note: Refer to GA22-6866 for operation of specific models, speCial features required, mode resets, and precedence of commands. Sense 04 Density Parity DC Trans CmcI
Read Backward OC { {"n oft
13
Write 01 odd off { off 33
Read 02 200 on 3B
Rewind (REW) 07 :¥ even off { off
23 u Rewind-Unload (RUN) OF ftI 2B on
Erase Gap (ERG) 17 t: { {"" off
53
Write Tape Mark (WTM) 1F
odd off { off 73
Backspace Block (BSB) 27 III 556 on 7B -0 Backspace File (BSF) 2F even off { off
63
Forward Space Block (FSB) 37 4i { {on 6B
Forward Space File (FSF) 3F (J) 93
Request Track in Error (TIE) 1B
odd off { off B3
Diagnostic Mode Set OB SOO on BS Set Mode 2 (9-track), 1600 bpi C3
even off { off
A3
Set Mode 2 (9-track), 800 bpi CB on AB -Special feature required.