Referenc E Tables; Standard Symbols And Codes; Standard Character Sets; Control Codes - Xerox 560 Reference Manual

APPENDIX A. REFERENCE TABLES
This appendix contains the following reference material:
Title
Standard Symbo Is and Codes
Standard 8-Bit Computer Codes (EBCDIC)
Standard 7-Bit Communication Codes (ANSCII)
Standard Symbol-Code Correspondences
Hexadecimal Arithmetic
Addition Table
Multiplication Table
Table of Powers of Sixteen 10
Table of Powers of Ten16
Hexadecimal-Decimal Integer Conversion Table
Hexadecimal-Decimal Fraction Conversion Table
Table of Powers of Two
Mathematical Constants
STANDARD SYMBOLS AND CODES
The symbol and code standards described in this publ ication
are applicable to all Xerox computer products, both hard-
ware and software. They may be expanded or altered from
time to time to meet changing requirements.
The symbols listed here include two types: graphic symbols
and control characters. Graphic symbols are displayable
and printable; control characters are not. Hybrids are SP,
the symbol for a blank space; and DEL, the delete code,
which is not considered a control command.
Three types of code are shown: (1) the 8-bit Xerox Standard
Computer Code, i.e., the Extended Binary-Coded-Decimal
Interchange Code (EBCDIC); (2) the 7-bit American National
Standard Code for Information Interchange (ANSCII); and
(3) the Xerox standard card code.
STANDARD CHARACTER SETS
1.
EBCDIC
57-character set: uppercase letters, numerals, space,
and & /
< > ( )
+
I
$
*
%
#
@
63-character set: same as above plus
i
II
89-character set: same as 63-character set pi us
I owercasel etters
2. ANSCII
?
64-character set: uppercase letters, numerals, space,
and "! $
% & ( )
* + ,
/ \ <
> ?
@ [ ]
A
#
95-character set: same as above plus lowercase letters
and { }
CONTROL CODES
In addition to the standard character sets I isted above, the
symbol repertoire includes 37 control codes and the hybrid
code DEi.. (hybrid code SP is considered part of aii charac-
ter sets). These are I isted in the table titled Standard
Symbo I-Code Correspondences.
SPECIAL CODE PROPERTIES
The following two properties of all standard codes wi" be
retained for future standard code extensions:
1. All control codes, and onl y the control codes, have
their two high-order bits equal to 1100". DEL is not
considered a control code.
2. No two graphic EBCDIC codes have their seven low-
order bits equal.
Appendix A 173