Article: RS232 keypad with autorepeat and 2 key rollover.
You can view the page at https://www.electro-tech-online.com/articles/rs232-keypad-with-autorepeat-and-2-key-rollover.108/
You can view the page at https://www.electro-tech-online.com/articles/rs232-keypad-with-autorepeat-and-2-key-rollover.108/