IBM 2025 Maintenance Manual page 5

2.33.5 Data Check (Sense Bit 4)--MCS Only
2.33.6 Sense Bit 5
2.33.7 Sense Bit 6
2.33.8 Channel 9 (Sense Bit 7)
2.34 Use Meter (1403) .
2.35 Resets (Integrated 1403).
2:36 External to CPU Facilities (1403)
2.36.1 PRI (Print Line Buffer Data-In)
2.36.2 PRT (Print Line Buffer Address Register
Data-In)
2.36.3 PRS (1403 Sense/Status Conditions)
2.36.4 PRD (Diagnostic Conditions)
2.36.4. l Diagnostic Decode 1 .
2.36.4.2 Diagnostic Decode 2 .
2.36.4.3 Diagnostic Decode 3 .
2.36.4.4 Diagnostic Decode 4 .
2.37 CPU To External Facilities (1403) .
2.3 7 .1 PRC (Carriage Control Register Data-Out)
2.38 MCS Table--Utility Program .
SECTION lC. 2311/DAC Procedures
2.39 Addressing--2311 Disk Storage Drive
2.40 Operation Commands, DAC .
2.41 Sense Conditions, DAC ,
2.42 Track Orientation.
2.43 Track Initialization (Defective-Track
Determination) .
2.44 Error Recovery Procedures, 2311 DAC
2.44.1 Error Messages, 2311 DAC .
2.44. 2 Error Conditions Table, 2311 DAC
SECTION lD. 2540 PROCEDURES .
2.45 Addressing, Integrated 2540 Attachment
2.46 Error Recovery Routine-Integrated Punch
2.47 Error Recovery Routine--Integrated Reader
2.48 2540 Restarts from Error Conditions
2.49 Jam Removal .
2.50 External To CPU Facilities (2540) .
2.50.1 RPl (Reader-Punch Data In)
2.50.2 RP2 (Reader-Punch Data In)
2.50.3 RS (Reader Branch Conditions)
2.50.4 PS (Punch Branch Conditions) .
2.50.5 RPS (Reader and Punch Branch Conditions) .
2.50.6 RPDl (Diagnostic Reader/Punch Branch
Conditions.
2.50. 7 RPD2 (Diagnostic Reader/Punch Branch
Conditions)
2.51 CPU To External Facilities (2540) .
2.51.1 R = K (CS Decode= B)
2.51.2 P = K (CS Decode= F) .
2.51.3 RP= K (CS Decode= D)
2.51.4 D
=
K (CS Decode = 9) .
2.51.5 PO (Card-Punch Data Out)
SECTION lE. CHANNEL PROCEDURES
2.5 2 Multiplexer Channel Device Addressing
2.5 3 Selector Channel Device Addressing
2.54 Channel and Unit Addressing Restrictions.
2.54.1 Channel 1 .
2.54.2 Channel 0 (Except 16K and 24K Systems with
Both the MPX Channel and ICA Features .
2.54.3 Channel 0 (16K and 24K Systems with Both
the MPX Channel and ICA Features) .
2.54.4 Assigning Integrated 1052, 1403, 2311, and
2540 Device Addresses .
2.55 Multiplexer-Channel Unit Control Words
2.55.1 Channel Status (Byte 0).
2.55.2 Op-Flag (Byte 1) .
2.55.3 Data Address (Bytes 2 and 3)
2.55.4 Count (Bytes 4 and 5)
2.55.5 Next CCW Address (Byte 6 and 7).
2.56 Selector Channel Control Information .
2.56. l Channel Status (LS Zone 7 Register GO)
2.~6.
2 Op Flag (LS Zone 7 Register G
1) .
2-19
2-20
2-20
2-20
2-20
2-20
2-20
2-20
2-20
2-20
2-21
2-21
2-21
2-21
2-21
2-21
2-21
2-22
2-23
2-23
2-23
2-24
2-24
2-25
2-26
2-26
2-26
2-29
2-29
2-29
2-29
2-29
2-33
2-33
2-33
2-33
2-33
2-33
2-34
2-34
2-34
2-35
2-35
2-35
2-36
2-36
2-36
2-37
2-37
2-37
2-37
2-37
2-38
2-39
2-40
2-41
2-41
2-41
2-41
2-42
2-42
2-42
2-42
2-42
2.56.3 Data Addrt!ss (LS Zone 7 Register V) .
2.56.4 Count (LS Zone 7 Register U) .
2.56.5 Next CCW Address (Auxiliary Storage
Location 008A)
2.57 Channel Error-Handling Philosophy and Logout
2.57.1 Channel Status Byte .
2.57.2 Logout
2.57.2.1 Channel Control Check Logout.
2.57.2.2 Interface Control Check Logout
2.5 8 Standard Interface Hardware
2.59 External to CPU Facilities (Channel)
2.59.1 GS (Channel Branch Conditions)
2.59.2 GT (Channel Branch Conditions)
2.59.3 GD (Channel Diagnostic Register) .
2.59.4 GB/IN (Channel Bus-In) .
2.60 CPU to External Facilities (Channel)
2.60.1 GB/OUT (Channel Bus-Out)
2.61 Handload Routine for Channel .
SECTION lF. ICA PROCEDURES
2.62 Nonoperational Lines
2.63 Station Selection Feature
2.64 Jumper Options
SECTION 2. FEATURES .
2.65 Storage Protect Key-Display
2.66 Multiple Character Set
2.67 External Interruption
2.68 2560 Procedures .
2.68.1 Handload Routine for 2560
Chapter 3. Preventive Maintenance .
SECTION 1. BASIC UNIT
SECTION 2. FEATURES .
Chapter 4. Checks, Adjustments, and Removals.
SECTION 1. BASIC UNIT
4.1 CPU Timing .
4.1.1 Specifications
4.2 Core Storage Array Temperature Control
4.2.1 Cooling .
4. 2.1.1 Specification
4.2.2 Heating .
4.2.2. l Specifications
4.2.2.2 Heater Adjustment.
4.3 Schmoo Curve (Main Storage)
4.3.1 Example of Schmoo Curve Procedure
4.3.2 When to Schmoo
4.3.3 Service Checks .
4.3.4 Worst-Case Patterns
4.3.4.1 Worst-Case Test
4.3.5 Four-Point Strobe Schmoo Procedure
4.3.6 Checkout Procedures .
4.3.6.1 Scoping Main Storage
4.3.7 Two-Point Schmoo Procedure
4.4 Main Storage Replacement
4.4.1 Removing the 0-32K Unit
4.4.2 Removing the 32-64K Unit
4.4.3 Array Changing
4.4.4 Changing Diodes
4.5 Local Storage
4.5.1 Scoping Local Storage.
4.5.2 Initial Delay Line Settings
4.5.3 Delay Lines (Local Storage) Adjustment)
4.5.4 Local Storage/Storage Protect Cards
4.6 SCR Circuits
4.6.1 Replacement
4.7 System Reset, IPL, or CSL--Singleshot
4.7.1 Adjustment.
4.8 Operational Out--Singleshot
4.8.1 Adjustment.
4.8.2 Checkout Procedure
4.9 2540 Attachment
2-42
2-42
2-42
2-42
2-43
2-43
2-43
2-44
2-46
2-46
2-46
2-46
2-46
2-47
2-47
2-47
2-47
2-48
2-48
2-48
2-48
2-49
2-49
2-49
2-49
2-49
2-49
3-1
3-2
3-3
4-1
4-1
4-1
4-1
4-1
4-1
4-1
4-1
4-1
4-1
4-3
4-4
4-4
4-4
4-4
4-4
4-4
4-5
4-5
4-5
4-5
4-5
4-6
4-6
4-6
4-6
4-6
4-6
4-6
4-7
4-7
4-8
4-8
4-8
4-8
4-8
4-8
4-8
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