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Digital Equipment Manuals
Computer Hardware
MF11-U
Maintenance manual
Digital Equipment MF11-U Maintenance Manual
Pdp11 core memory system
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Contents
Table of Contents
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Table of Contents
Table of Contents
MATB CLK MDR 0 L, MATB CLK MDR 1 L Signals
MATB PAUSE H Signal
MATC READ EARLY L Signal
MATC END STROBEL Signal
MATC READ LATE L Signal
MATC OUTPUT ENABLE H Signal
BUS SSYN L Signal
MATC 300 NS DLY H Signal
MATD WRITE EARLY L Signal
MATD STACK CHG H Signal
MATD WRITE LATE L Signal
MATD INH TIME H Signal
WRITE LOCKOUT H Signal
MATD END of WRITE L Signal
Chapter3 Driver, Sense and Stack Modules
Introduction
Core Array
Memory Operation
Andy Decoding
Drivers and Switches
Word Address Decoding and Selection Sequence
Read/Write Current Generation and Sensing
Introduction
Read/Write Operations
And y Current Generators
Inhibit Driver
Sense Amplifier
Memory Data Register
Stack Charge Circuit
CHAPTER 4 Mfll-UP CORE MEMORY with PARITY
Introduction
Description
Specifications
Functional Description
DATI or DATIP Cycle
DATO Cycle
DATOB Cycle
Jumper Terminals
Programming
Bus Loading
Internal Bus
Possible Interlea Ying Configurations
Address Selection
Chapter 5 Installation and Maintenance
Introduction
Installation
Mounting Box and Power System
Jumper Configuration
Installation Procedure
Preventive Maintenance
Visual Inspection
Voltage Measurements
Sense Strobe Delay Check
Drive Current F:hecks
PCL SSYN DLY Check (for Parity Memories Only)
Strobe and Drive Current Margins
MAINDEC Testing
Corrective Maintenance
Voltage Adjustment Procedure
Sense Strobe Delay and Drive Current Adjustments
PCL SSYN DLY L Adjustment Procedure
Corrective Maintenance Aids
Maindec Testing
L 0-124K Memory Exerciser (MAINDEC-11-DZQMB)
Combined Parity Memory Tests (MAINDEC-11-DCMFA)
Appendix A IC Descriptions
741 High Performance Operational Amplifier
7442 4 Line to 1 Line Decoder
7475 4-Bit Bistable Latch
7483 4-Bit Binary Adder
7485 4-Bit Comparator
7528 Sense Amplifier
82S62 9-Bit Parity Generator and Checker
74121 Monostable Multivibrator
74154 4-Line to 16-Line Demultiplexer
A.io 75325 Memory Drivers
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