Direct Access Storage Devices - IBM System/370 Operator's Reference Manual

I/O COMMAND CODES (Contdl
DIRECT ACCESS STORAGE DEVICES:
3330-3340
SERIES
(GA26-1592, ·1617, -1619, -1620):
230512835 (GA26·1589);
2314 2319
(GA26-3599, -1606)
Command
MTOff MTOn"
Control Orient leI
2B
Recalibrate 13
Seek 07
Seek Cylinder
OB
Seek Head
lB
Space Count OF
Set File Mask
IF
Set Sector (a, tI 23
Restore (executes as a no-opl 17
Vary Sensing (el 27
Diagnostic Load (al
53
Diagnostic Write (al
73
Search Home Address Equal 39 B9
Identifier Equal 31
Bl
Identifier H igh 51 Dl
Identifier Equal or High 71 Fl
Key Equal
29 A9
Key High
49 C9
Key Equal or High
69 E9
Key and Data Equal (dl 2D AD
Key and Data High (d) 4D CD
Key and Data Eq. or Hi (dl 6D ED
Continue Search Equal (d)
25
A5
Scan
Search High (dl 45
C5
Search High or Equal (d)
65 E5
Set Compare (dl 35
B5
Set Compare (d)
75 F5
No Compare (dl 55
D5
Read Home Address
lA 9A
Count
12 92
Record 0 16 96
Data 06
86
Key and Data
OE
8E
Count, Key and Data
1E 9E
IPL 02
Sector (a,tI 22
Sense Sense I/O 04
Read, Reset Buffered Log (bl A4
Read Buffered Log Ie) 24
Device Release (el 94
Device Reserve (el B4
Read Diagnostic Status 1 (al 44
Count
Nonzero
Nonzero
6
6
6
3 (al; nonzero Id I
I
1
1
Nonzero
1
1
512
4
5
5
5
KL
KL
KL
)"-
of bytes
(including
mask bytes)
in search
argument
5
8
r~~
of bytes
to
be
transferred
1
24 (al; 6 (dl
24
128
24 (a);6 (d)
24 (al; 6 (dl
16 or 512
Write Home Address
19
5 (exe. 7 on
33401
Record 0
Erase
Count, Key and Data
Special Count, Key and Data
Data
Key and Data
*
Code same as MT Off except as listed.
•• Except 2314, 2319.
b. 3330-3340
Series
only:
manual reset on 3340.
c. 2305/2835 only.
15 8+KL +DL of
RO
11 8+KL+DL
10
8+KL+DL
01 8+KL+DL
05
DL
OD KL+DL
Q.
2314,2319 only .
e. String switch or 2·channel switch
feature required; standard on
2314 with 2844.
f. Special feature required on 3340.
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