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7252
Xerox 7252 Manuals
Manuals and User Guides for Xerox 7252. We have
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Xerox 7252 manual available for free PDF download: Reference Manual
Xerox 7252 Reference Manual (40 pages)
Cartridge Disk System
Brand:
Xerox
| Category:
Storage
| Size: 2.65 MB
Table of Contents
Table of Contents
5
General Description
7
Cartridge Disk System Configuration
7
Features
8
System Components
8
Introduction
7
Cartridge Disk System Components
8
Characte Ri St I Cs
8
IOCD Flag: Xerox 530 and Sigma
9
Functional Description
10
Equipment
10
Model 7250 Controller
10
Status Response
10
Cartridge Initialization
10
Error Checking
10
Model 7251/7252 Disk Drives
10
Operator Control Panel
10
Spindle Assembly
11
Read;Write Heads
11
Start-Up Cycle
11
Sketch of Model 7251/7252 Disk Drive
11
Write Protect Feature
12
Model 7254 Disk Cartridge
12
Read/Write Heads
12
I/OOPERATIONAL Flow
12
I/O Operational Flow - Xerox
13
Condition Codes
14
Service Cycles
15
Order out
15
Data out
15
Data in
15
Order in
15
Terminal Order
15
Disk Organization
15
Tracks
15
Disk Organization
16
Sectors
17
Cylinders
17
Data Organization
17
Parity
17
Cylinder Address
17
Data Presentation
17
Data Access
17
Track and Sector Incrementing
17
Examples of Automatic Incrementing
18
Error Conditions
18
Conditions
18
State Transitions
18
Data Transfers
19
System States
18
Operational Devices
18
Recommendations
19
Orders
20
Operation
20
Sense (X'04I)
21
Check-Write (X1OSI)
21
Read (X'121)
21
Test (X'13 1 )
21
Test Mode
21
Test Mode 2 (Check-Write)
21
Program Interface
20
Device Orders
20
Write (X 1011)
20
Read (X 102 I)
20
Seek (X I 03 1 )
20
Test Mode Selection
21
TEST MODE 2 (Read)
22
Key Events
22
Start Input/Output
22
Unusual End Conditions
22
Channel End Conditions
22
Fau It Conditions
22
Transmission Error Conditions
22
Incorrect Length Conditions
22
Status Response
23
Overflow and Carry Indicators
23
Condition Codes
23
Device Status Byte
23
Operational Status Byte
23
Device Status Byte for SIO, TIO, and HIO Instructions
24
Operational Status Byte
26
Additional Programming Considerations
26
Information Protection
26
Command Chaining and Data Chaining
26
I/O Interrupt Envi Ronment
26
Computers
26
Sequence of Activity
26
Disk I/O Program/Cartridge Disk System Actions
27
Write Order
28
Read Order
29
Seek/Sense Order
30
Check-Write Order
31
Test Order
32
Operations
33
Control Panels
33
Operator Control Panel
33
LOAD/RUN Switch
33
LOAD Indicator
33
READY Indicator
33
CHECK Indicator
33
PROTECT Indicator
33
Disk Drive Operator Control Panel
33
Controller Maintenance Panel
34
Controller and Maintenance Panel
34
Operator Control Panel Summary
34
Operating Procedures
35
General Operating Practices
35
Disk Drive Interlocks
35
System Power Turn on Procedure
35
Disk Drive Start up Procedure
35
Power Distribution Panel
36
PT20C Power Supply
36
Disk Drive Stopping Procedure
37
System Power Turn off Procedure
37
Opening Cartridge Holding Clamps
38
Removing Bottom Cover from Disk
38
Loading and Unloading a Cartridge
38
Placing Bottom Cover over Cartridge
38
Cartridge Procedures
39
Label Ing Cartridges
39
Inspecting Cartridges
39
Cleaning Procedures
40
Storing Cartridges
40
Usage Log
40
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