Xerox 560 Reference Manual page 5

4. INPUT/OUTPUT OPERA TIO NS
142 AGURES
External DIO Interface 142
1. A Xerox 560 Computer System
9
Multiplexor Input/Output Processor (MIOP)
Devi ce Controllers
142 2. The Basic Processor 10
Rotating Memory Processor (RMP)
143
Input/Output Processor (lOP) Fundamentals _ _ 143
3. Information Boundaries 13
Command List 143
Operational IOCD 143
4. Main Memory 15
Control IOCD 146
I/o
Operation Phases 148 5. Addressing Logic
18
Preparation Phase 148
Initiation Phase 148 6. Index Displacement Alignment (Real and
Fetching Phase 148 Virtual Addressing Modes)
21
Execution Phase 149
Termination Phase 151 7.
Generation of Actual Addresses Indirect,
Virtual Addressing
22
5. OPERATIONAL CONTROL
152 8. Index Displacement Alignment (Real-
Extended Addressing) 23
Externa
I
Control Subsystem 152
Central ized System Control 152
9.
Generation of Effective Virtual Address
Control Console Devices 152 (Indirect Real-Extended Addressing) 24
Control Commands 153
Operator Control Commands 153 10. Operational States of an Interrupt Level 31
Diagnosti c Control Commands 156
Maintenance Control Commands 158 1l. Interrupt Priority Chain 34
System Control Panel 161
Operating Procedures and Information _ _ _ 164
12. Typical 28-Word Portion of Memory Stack
for PSS and P LS 102
6. SYSTEM CONFIGURATION CONTROL 167 13. Formats of
I/o
Instructions 128
Configuration Control Panel (CCP)
167 14. Bootstrap Loader 155
15.
APPENDIXES
System Control Panel 162
16. Chassis Physical Configuration 168
A. REFERENC E TABLES 173
17. Sample Rows of CCP Switches 168
Standard Symbols and Codes 173
Standard Character Sets
173
Control Codes
173
Special Code Properties
173
Standard 8-Bit Computer Codes (EBCDIC) _ _ _ 174
Standard 7-Bit Communication Codes
TABLES
(ANSCII) 174
Standard Symbol-Code Correspondences
175
l.
Basic Processor Operating Modes and
Hexadecimal Arithmetic
179 Address i ng Cases 25
Addition Table
179
Multiplication Table 179 2. Interrupt Locations
33
Table of Powers of SixteenlO 180
Table of Powers of Ten16 180 3. Summary of Trap Locations
37
Hexadecimal-Decimal Integer Conversion
Table 181 4. TCC Setting for Instruction Exception
Hexadecimal-Decimal Fraction Conversion Trap X ' 4D '
44
Table
187
Table of Powers of Two 191 5. Registers Changed at Time of a Trap Due to
Mathematica
I
Constants 191 an Operand Access 45
B. GLOSSARY OF SYMBOLIC TERMS 192 6. ANALYZE Table for Operation Codes
57
C.
FAULT STATUS REGISTERS 195 7. Floating-Point Number Representation
76
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