公开(公告)号：US3778819A

公开(公告)日：1973-12-11

申请号：US3778819D

申请日：1972-11-17

Applicant: IBM

Inventor： BHAGAWAN V ,  JONES R ,  MCDOWELL A ,  RUPP B ,  WHITTAKER R ,  MINE G ,  REMSBURGER L

IPC: G06F3/02 ,  G06F3/023 ,  H03M11/14 ,  H03M11/18 ,  H04L13/16

CPC classification number: H03M11/18

Abstract: A circuit is provided for operating a keyboard in a selected one of four character sets: upper and lower case Latin and upper and lower case Katakana. The circuit responds to signals produced by the familiar Shift and Lock keys of a conventional keyboard. One of the shift keys is designated a Latin shift key and the other is designated a Katakana shift key. Depressing a shift key momentarily sets the keyboard to operate in the lower case of the character set identified by the shift key. For upper case, the operator either sets the shift Lock or holds the appropriate shift key while striking a character key. A specific logic circuit is disclosed.

Abstract translation: 提供一种用于操作四个字符集中所选择的一个键盘的电路：大小写拉丁语和大小写片假名。 电路响应常规键盘熟悉的Shift和Lock键产生的信号。 其中一个换档键被指定为拉丁移位键，另一个被指定为片假名移位键。 按下shift键可以暂时将键盘设置为在由Shift键识别的字符集的小写中操作。 对于大写字母，操作员可以设置移位锁定或保持适当的移位键同时敲击字符键。 公开了一种特定的逻辑电路。