This command is used in conjunction with the LORES or HIRES graphics mode. The point specified by int expl,int-exp2 is turned off. If the H suffix is used, the Y axis will be inverted, so that numbering starts from the top left hand corner of the screen, rather than the bottom left hand corner.
Program Example.
00100 REM A demonstration of the LORES reset command
00110 CLS
00120 LORES
00130 SET 20,20 : REM Turn the dot on
00140 FOR I = 1 TO 800 : NEXT I: REM A simple delay.
00150 RESET 20,20 : REM Turn the dot off
00160 FOR I = 1 TO 800 : NEXT I : REM A simple delay
00170 SET 20,20 : REM Turn the dot off
00180 FOR I = 1 TO 800 : NEXT I : REM A simple delay
00190 RESETH 20,27 : REM Turn the dot off that was set by 170
00200 FOR I = 1 TO 800 : NEXT I : REM A simple delay
00210 END