Data memory - explanation please

[malc-c]

Uhmm maybe I spoke too soon...

I have a menu section, which in tern selects sub menus to set the various variables up and then return back to the main menu. The last option of the main menu is this

LCDOUT $FE,1 
Gosub SetButtonRelease
Lcdout $FE,2
LCDOUT $FE,$80,"Saving Settings"
for fn= 0 to 3
  write (10*fn + 80),lightsetHR[fn]
  write (10*fn + 81),lightsetMN[fn]
  write (10*fn + 82),lightoffHR[fn]
  write (10*fn + 83),lightoffMN[fn]
  write (10*fn + 84),droptemp[fn]
  write (10*fn + 85),normtemp[fn]
  write (10*fn + 86),StartHour[fn]
  write (10*fn + 87),StartMin[fn]
  write (10*fn + 88),StopHour[fn]
  write (10*fn + 89),StopMin[fn]
  write (10*fn + 90),alarmhigh[fn]
  Write (10*fn + 91),alarmlow[fn]
  
next fn
pause 150
goto main

which when selected should write all the variables to memory before going to the main program.

On powerup the values are read back in as part of the initialisation

for fn= 0 to 3
  read (10*fn + 80),lightsetHR[fn]
  Read (10*fn + 81),lightsetMN[fn]
  Read (10*fn + 82),lightoffHR[fn]
  Read (10*fn + 83),lightoffMN[fn]
  Read (10*fn + 84),droptemp[fn]
  Read (10*fn + 85),normtemp[fn]
  Read (10*fn + 86),StartHour[fn]
  Read (10*fn + 87),StartMin[fn]
  Read (10*fn + 88),StopHour[fn]
  Read (10*fn + 89),StopMin[fn]
  Read (10*fn + 90),alarmhigh[fn]
  Read (10*fn + 91),alarmlow[fn]
  
next fn

the strange thing is that the normaltemp, alarmhigh and alarmlow values don't appear to of been saved (or are being misread in some way).

Interestingly, the data view doesn't show anything at 80