AND  R1, R1, #0   ; zero out R1
ADD  R1, R1, #12  ; R1 = 12

ADD  R0, R6, #4   ; R0 contains address of day
ADD  R0, R0, #0   ; R0 contains address of day.highTemp
STR  R1, R0, #0   ; day.highTemp = 12; 

AND  R1, R1, #0   ; zero out R1
ADD  R1, R1, #1   ; R1 = 1

ADD  R0, R6, #4   ; R0 contains address of day
ADD  R0, R0, #1   ; R0 contains address of day.lowTemp
STR  R1, R0, #0   ; day.lowTemp = 1;