Data memory - explanation please

[malc-c]

Hi Charles,

Sorry, please bear with me as this is the first time I've experimented with saving data other than when programming mode.

I want to save the following to the PIC once the user has set them so that in the event of a power failure they are remembered and the user doesn't have to re-enter the data.

save:
Lcdout $FE,2
LCDOUT $FE,$80,"Saving Settings"
for fn= 0 to 3
write ,lightsetHR[fn]
write ,lightsetMN[fn]
write ,lightoffHR[fn]
write ,lightoffMN[fn]
write ,droptemp[fn]
write ,normtemp[fn]
write ,StartHour[fn]
write ,StartMin[fn]
write ,StopHour[fn]
write ,StopMin[fn]
next fn
pause 150
goto mainmenu

However as the program writes data to the memory at the time of programming and as part of the RTC settings (data@ 0,0 and data@150 respectively) I'm not sure what value to place before the colon after the word statement for each of the above. I don't want to corrupt the data stored at those data locations.

For example - 0x50 address in that table appears blank (FF) - so could I use

write 0x50 ,lightsetHR[fn]

Or whatever decimal 0x50 would be ???

Hope that's clear ?

Oh and I'm using DT's interrupts... would I need to use DEFINE WRITE_INT 1 withing that sub-routine ?