BLDBIT EQU #019BC   low level ASCII buffer to display
COLON  EQU #0003A   hex value of ':'
ASRW4  EQU #0ED0D   4 ASR W
MAINLP EQU #002FD   main execution loop
YMDHMS EQU #130DB   returns current YYMMDDHHMMSS in C
CK"ON" EQU #076AD   checks if 'ON' key pressed
FUNCR0 EQU #2F89B   function scratch
HEXASC EQU #17148   convert BCD hex digits to ASCII