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DECtape 551
DEC DECtape 551 Manuals
Manuals and User Guides for DEC DECtape 551. We have
1
DEC DECtape 551 manual available for free PDF download: Manual
DEC DECtape 551 Manual (79 pages)
Brand:
DEC
| Category:
Storage
| Size: 3.21 MB
Table of Contents
Table of Contents
1
Introduction and Description
7
Purpose of Equipment
7
Functional Description
7
Physical Description
8
Physical Specifications
9
Electrical Description
9
Pertinent Documents
10
2 System Description
11
Data Control Type 136
11
Dectape Control Type 551
12
DEC Tape Transport Type 555
12
Recording Format
12
Manchester Recording
13
Placement of Dectape Tracks
13
Redundant Recording
14
Mark Track Format
14
Block Format
15
Block Mark, Block-Mark Space, Block-Mark End
15
Data Sync
17
Reverse Data-End Mark
17
Data Mark
18
Forward Data-End Mark
18
Block-Mark Sync
18
Reverse Block Mark
19
Reverse and Forward End Marks
19
Reg Isters of the Type 551
19
Control Register
19
Dectape Control Type 551 Block Diagram
20
Status Register
22
Read-Write Buffer
23
Mark Track Window
23
Error Check Register
23
Block Mark Timing Register
24
Data Timing Register
24
3 Theory of Operation
25
Block Schematic Discussion
25
Initial Ization Operations
25
Command Decoding
27
Functions
28
Write Block Mark Operation
29
Write Data Operations
32
Write All Operation
35
Read Operations
35
Write Timing and Mark Track
37
Operation
37
Automatic Error Checking
38
Status Checking Operations
41
Program Interrupt Operations
41
Circuit Discussion
42
Manchester Reader and Writer Type 4523
42
Mark Track Decoder Type 4260
44
Level Standardizer Type 1501
45
4 Interface
47
Interface Signals from I/O Bus
47
Interface Signals to I/O Bus
48
Interface Signals from Type 555 Tape Transports
50
Interface Signals to Type 555 Tape Transports
51
Interface Signals from Data Control 136
51
Interface Signals to Data Control 136
52
Maintenance Equipment
55
Type 4304 Delay Control Check
59
Type 4401 Variable Clock Check
60
Type 4523 Manchester Reader/Writer Check
60
Read/Write Circuitry Check
62
Timing Checks
65
Corrective Maintenance
65
Preliminary Investigation
66
System Troubleshooting
66
Dectape Control Troubleshooting
66
Spare Parts Program
67
Semiconductor Spares
68
Pulse Transformer Spares
69
Circuit Troubleshooting
70
Validation Test
72
Log Entry
73
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