Specifications
TABLE OF CONTENTS
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CHAPIER 1 lNTRODUCTlOR
PDP-11 SYSTEMS
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1
UNIBUS
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KAl 1 PROCESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ?. 1
Priority Interrupts ,...............,..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Reentrant
Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Registers . . . . . . . . . . . . . . . . . . . . :... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Instruction Set . . . . . . . . . .._........................................................
Addressing . ..~...............................................~........,...,.........
z
Asynchronous
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . L 2
PACKAGJNG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..I . . . . . . . . . . . . . .
SOmARE
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.:
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CHAPTER 2
SYSTEM INTRODUCTION
SYSTEM DEFINITION ..................................................................
SYSTEM COMPONENTS ...............................................................
UNIBUS ................................................... .
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Single Bus
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Bidirectional Lines ............
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..* ....
Master-Slave
Relation
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Interlocked .Communication
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Dynamic Master-Slave Relation ...........................................
KAll CENTRAL PROCESSOR
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General Registers
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Central
Processor Status Register
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CORE MEMORY .............................................................................
PERIPHERAL DEVICES ................................................................
SYSTEM INTERACTION ................................................................
TRANSFER
OF BUS
MASTER ......................................................
PRIORITY STRUCTURE ............
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NPR Requests
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.I ...........................
Interrupt Requests ..............................................................
CHAPTER 3 ADDRESSING MODES
INTRODUCTION
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ADDRESS FIELDS
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General Register Addressing
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*Indexed
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Addressing
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Autoincrement Mode Addressing
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Autodecrement Addressing .................... . .............................
STACK PROCESSING ..................................................................
USE OF THE PC AS A GENERAL REGISTER
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_ ...
Immediate Addressing .........................................................
Absolute Addressing
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Relative Addressing
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Deferred Relative Addressing .......................................... ..:.
USE OF THE SP AS A GENERAL REGISTER ................................
DOUBLE OPERAND ADDRESSING ..............................................
&iAPTER 4 INSTRUCTlOil Sk
INSTRUCTION
TIMING
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NOTATION
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2
3
5
5
5
5
5
5
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6
l
6
6
6
7
5
7
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11
11
11
12
12
12
13
13
13
13
14
14
14
14
17
17
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