as to the antenna coil 20 the coded transmission is transmitted by the antenna 20 to a garage door operator or other device to be operated as appropriate while there have been illustrated and described particular embodiments of the present invention it will be appreciated that numerous changes and modifications will occur to those skilled in the art and it is intended in the appended claims to cover all those changes and modifications which fall within the true spirit and scope of the present invention __________________________________________________________________________ equate statements p01m sub init equ 00000100b set mode p00 p03 outp2m sub init equ 00000001bp3m sub init equ 00000001b set port3 p3 p33 inputp01s sub init equ 60000001bp2s sub init equ 00000000bp3s sub init equ 00000000b interrupts all sub on sub imr equ 00010000b turn on int for radioreturn sub imr equ 00010000b return on the imr global registers code output functions code sub grp equ 10h codepos equ code sub grp 0 code presently being outputedc11 equ code sub grp 1 code first bitc12 equ code sub grp 2 code second bitc13 equ code sub grp 3 code third bitc14 equ code sub grp 4 code fourth bitc15 equ code sub grp 5 code fifth bitc16 equ code sub grp 6 code sixed bitc17 equ code sub grp 7 code seventh bitc18 equ code sub grp 8 code eight bitc19 equ code sub grp 9 code nineth bitc110 equ code sub.