the free version of KEIL has | Microcontroller › 8051 › code problem-How to make an alphabetic keypad using 8051 microcontroller (AT89C51) › the free version of KEIL has March 27, 2015 at 7:34 am #12737 Ashutosh BhattParticipant the free version of KEIL has limitation to compile code with max 2K memory only. in ur case the limit is exceeding slightly so u just optimize ur code some how and it will work
