Character printing system in electronic data processing apparatus such as electronic calculators

A combined electronic data processor and calculator including a character printing system for printing language character data generated in accordance with a set of numerical value key code data in a language printing mode, said language character data being represented by said set of numerical value key code data in accordance with a predetermined convention, said system comprising:

• numerical value keying input means for entering selected numerical value key code data into said character printing system when in a numerical printing mode, said set of numerical value key code data including a combination of said numerical value key code data in accordance with said predetermined convention, said numerical value keying input means further entering numerical data for selective presentation to said calculator;
• storage means responsive to said numerical value key code data introduced by said numerical value keying input means for sequentially storing said numerical value key code data therein, said storage means including memory means responsive to the numerical value keying input means for storing said numerical value key code data therein, said memory means developing an output signal indicative of said numerical value key code data;
• function keying input means for entering selected function key code data representative of one of said printing modes into said character printing system, the numerical value key code data signal developed by said memory means in addition to said selected function key code data indicative of a selected printing mode identifying the language characters to be printed, said function keying input means including,
• a language kind specifying key;
• language bistable latch means operatively connected to said language kind specifying key, said language bistable latch means alternating between first and second states of function key code data by repeated actuation of said language kind specifying key, said first and second states being indicative of first and second particular languages of said language characters undergoing printing;
• converting means responsive to said selected function key code data and to the set of numerical value key code data for converting said numerical value key code data into said language character data of a predetermined language in accordance with said selected function key code data entered via said function keying input means;
• character generating means responsive to said language character data generated by said converting means for generating said language characters to be printed in accordance with said language character data, the language characters being printed in the language determined by the language kind specifying key;
• said calculator receiving said numerical data from said numerical value keying input means and performing desired calculations thereon to produce calculated results;
• and
• printing means for printing said language characters and said calculated results.