Thå timå differencå computationó currentlù useä iî thå variouó �
MBASIà RBBÓ programó doeó noô givå thå propeò  time-on-systeí �
resultó  foò  useró thaô sign-oî prioò tï 240°  hró  anä  theî �
remaiî oî thå systeí afteò midnight®   Bù addinç thå followinç �
twï  lineó iî thå appropriatå subroutines¬  thå propeò elapseä �
timå wilì bå displayed:

      '    (calculate the time difference...)
      IF H(6)<HT(6) THEN H(6)=H(6)+10:H(5)=H(5)-1
      IF H(5)<HT(5) THEN H(5)=H(5)+6:H(4)=H(4)-1
      IF H(4)<HT(4) THEN H(4)=H(4)+10:H(3)=H(3)-1
      IF H(3)<HT(3) THEN H(3)=H(3)+6:H(2)=H(2)-1
      IF H(2)<HT(2) THEN H(2)=H(2)+10:H(1)=H(1)-1
--->  IF H(1)<HT(1) THEN H(1)=H(1)+3:H(2)=H(2)-6
--->  IF H(2)<HT(2) THEN H(2)=H(2)+10:H(1)=H(1)-1
      HD(6)=H(6)-HT(6):HD(5)=H(5)-HT(5):HD(4)=H(4)-HT(4)
      HD(3)=H(3)-HT(3):HD(2)=H(2)-HT(2):HD(1)=H(1)-HT(1)

Iæ  á  useò remainó signed-oî foò oveò 2´ houró (don'ô asë  må �
whù  thió  woulä  eveò occur!!© thå elapseä timå  wilì  bå  iî �
error¬  otherwiså  thió wilì takå carå oæ thå switchoveò  thaô �
occuró betweeî 235¹ anä 0000 hours.

  Hope this is of some help.     Bill Aten