Radio paging device having circuitry of rewriting a stored message with

Abstract

In a radio display pager, each character of a received multi-character message is checked for error. A first message arrival or a first receive message is stored in a temporary memory and thereafter rewritten into one of main memories when the next message or second message arrival is received. The temporary memory stores the most recent message arrival and the main memories store a plurality of like messages, according to their successive order of earlier arrivals. Each of the messages in both memories contain both error-free and error-containing characters. The characters stored in the temporary memory respectively correspond in position to the characters stored in each of the main memories. A comparison is made between each error-free character in the temporary memory and each of the positionally corresponding error-free characters in one of the main memories in order to detect a match and mismatch. If a mismatch is detected, all characters of each main memory are transferred to an adjacent main memory in order to vacate a storage area. Then, all characters in the temporary memory are transferred to the vacated area for display. If a match is detected, it is counted for all characters of the received message. If the count is smaller than a threshold value, all characters of each main memory are transferred to an adjacent main memory in order to vacate a storage area. All characters in the temporary memory are transferred to that vacated area for display. If the count of the matches is greater than the threshold value, all the error-free characters in the temporary memory are transferred to one of the main memories for display.