CDC 3000 - Character Set

Character Set

The operating systems for the CDC 3xxx typically used 6 bit characters, so the 64 character set did not contain lowercase letters. The character set contained (in display code order). This 6-bit extension of the 4-bit BCD encoding was referred to as BCDIC (BCD interchange code.) IBM later extended this code further to create the 8-bit "extended BCDIC", or EBCDIC code.

: A-Z 0-9 + - * / ( ) $ = (space), . # % " _ ! & ' ? < > @ \ ^ ;

Depending on the device, some characters are rendered differently, especially the lineprinter and some terminals:

character	sometimes displays as
#	≡
"	≠
_	→ or {
!	∨
&	∧
'	↑
?	↓ or }
@	≤
\	≥
^	¬

Note the absence of control characters, especially carriage return and line feed. These were encoded by the record structure.