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Index
A
Access Times, Read/Write (Figure
1)
Action Requirements .
Addressing
. . . . .
Attention (Status Bit
O)
Automatic Threading
B
Backspace Block (BSB) Command
Backspace File (BSF) Command .
Basic Subsystem . . . . . . . .
Burst Commands . . . . . . . . .
Bus Out Check (Sense Byte 0, Bit 2)
Busy (Status Bit
3) . . . . . . . .
c
Cartridge, IBM Easy Load
. . . . .
Chaining Check (ERP, Action VI) . .
Channel Data Check (ERP, Action VI)
Channel End (Status Bit
4)
. . . . .
Channel Fails To Select Tape Unit . .
Command Reject (ERP, Action XIII)
Command Reject (Sense Byte 0, Bit O)
Commands
. . . . . . . . . . .
Commands,
3803-2/3420
(Figure
6)
Commands, Burst
. . . . . . . .
Loop Write-To-Read (L WR) . .
Read Backward . . . . . . . .
Read Forward . . . . . . . . .
.
Request Track-In-Error (Request TIE)
Sense . . . . .
Sense Release .
Sense Reserve .
Set Diagnose .
Write
. . .
3803-2/3420
(Figure
6) . .
Commands~
Motion Control .
Backspace Block (BSB)
Backspace File (BSF)
Data Security Erase (DSE)
Erase Gap (ERG) . . . .
Forward Space Block (FSB)
Forward Space File (FSF)
.
Rewind (REW) . . . . . .
Rewind/Unload (RUN)
Write Tape Mark (WTM)
.
Commands, Non-Motion Control
Diagnostic Mode Set (DMS)
Mode Set
1
(MS
1)
Mode Set 2 (MS. 2)
No-Operation (NOP)
Communicator . . . . . . . . . . . . .
Configurations,
3803-2
and
3420
(Figure
2)
Control Switches (2, 3, and 4) .
Control Unit End (Status Bit 2) . . . . .
.D
Data Check (ERP, Actions V, VI, VII, VIII)
Data Check (Sense Byte 0, Bit 4)
. . . . .
Data Converter
. . . . . . . . . . . . .
Data Converter Check (ERP, Action XIII) .
Data Converter Check (Sense Byte 0, Bit 7)
Data Rates (Figure 1) . . . . . . . . .
Data Security Erase (DSE) Command .
Data Security Erase (ERP.Action XI)
.
Data Transfer . . . . . . . . . . . .
Density Feature Combinations (Figure 3)
Device End (Status Bit 5) . . . . . . .
Device Switch . . . . . . . . . . . .
12
52
13
37
. 9
25
26
. 9
23
39
37
. 9
54
54
37
31
55
39
21
22
23
24
23
23
24
23
24
23
24
23
22
24
25
26
26
25
26
26
25
25
25
27
27
27
27
27
17
14
17
37
54,55
40
15
55
40
12
26
55
13
15
37
16
Diagnostic Mode Set(DMS) Command
Disable Switch(es) . . . . . . . . .
E
Enable/Disable Switch(es)
. . . . .
Equipment Check (ERP, Action X)
.
Equipment Check (Sense Byte 0, Bit 3)
Erase Gap (ERG) Command
Erase Head
. . . . . . .
Erasure, Full-Width . . . .
Error Recovery Procedures
F
Failure To Sense EOT
Features . . . . .
3803
Model
2 . .
Device Switch . .
Nine-Track NRZI
Seven-Track
Two-Channel Switch .
File Protection . . . . .
.
Forward Space Block (FSB) Command
Forward Space File (FSF) Command
Forward Start Time (Figure
1) .
Full-Width Erasure . . . . . .
G
General Characteristics,
3803
H
Halt 1/0 Instruction
Head, Erase
IBG Passing Times (Figure
1)
Incorrect Length (ERP, Action XII)
Indicators,
3420
File Protect .
Load Check.
Power Check
Ready
. . .
Select
Tape Indicate
Inserting Tape Reel In Cartridge .
lnterblock Gaps
. . . . . . . . . .
Intervention Required (ERP, Action
III)
.
Intervention Required (Sense Byte 0, Bit 1)
I/
0 Instructions
Halt 1/0 .
Test 1/0 .
1/0 Interface
L
Load Point (ERP, Action XII)
Load Procedure
. . . . . . .
Load/Rewind Pushbutton . . . . . .
Loop Write-To-Read (LWR) Command
M
Magnetic Tape and Reels
Metering
. . . . . . .
Mode Set 1 (MS 1) Command
Mode Set 2 (MS 2) Command
Models 4, 6, and
8, 3420
.N
Nine Track NRZI Feature . . . . . . . . .
Nine Track,
800
BPI, NRZI . . . . . . . .
No Previous Sense Bits On (ERP, Action X)
27
14,34
14,34
55
39
25
10
10
51
30
15
13
16
15
15
16
10
26
26
12
10
13
28
10
12
55
32
32
32
32
32
32
32
29
11
50
39
28
28
28
13
55
29
32
24
11
13
22,27
22,27
10
15
11
53
Index
57
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