Title:
ELECTRONIC COMPUTER
Document Type and Number:
Japanese Patent JPS5880755
Kind Code:
A
Abstract:
PURPOSE:To avoid a change of the contents of a program which is already fed by misoperation of keys, etc., by invalidating the operations of the keys which are related to the contents of a read/write memory to which a program is written. CONSTITUTION:In order to avoid the destruction of a program which is already fed by misoperation of keys, etc., LOCK is fed with operation of a character key 5 while keeping a RUN mode. Then an input key 6 is pushed. Thus a locking instruction is fed by means of the key 5, and therefore a flag showing a locking state is set. Under such conditions, no processing is carried out. Thus the program is never destructed in this state although a key is operated in a wrong way.
Inventors:
MORINO MASUAKI
FUJIKAWA YOSHIYUKI
HANEDA ISAMU
NAI TETSUO
FUJIKAWA YOSHIYUKI
HANEDA ISAMU
NAI TETSUO
Application Number:
JP18021781A
Publication Date:
May 14, 1983
Filing Date:
November 09, 1981
Export Citation:
Assignee:
SHARP KK
International Classes:
G06F12/14; G06F3/02; G06F15/02; G06F21/60; G06F21/79; (IPC1-7): G06F3/02; G06F15/06; G11C29/00
Domestic Patent References:
| JPS52129256A | 1977-10-29 |
Attorney, Agent or Firm:
Aoyama Aoi