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- 5 ON KEY (13) GOSUB 250
- 6 ON KEY (12) GOSUB 280
- 7 ON KEY (14) GOSUB 400
- 8 KEY (14) ON
- 10 PRINT"I.B.M.DISK DRIVE ALIGNMENT PROGRAM"
- 16 INPUT "PRESS ENTER TO CONTINUE",A$
- 20 DOR=&H3F2:SR=&H3F4:FD=&H3F5
- 30 OUT DOR,32
- 40 OUT DOR,37
- 50 OUT FD,3
- 60 OUT FD,&HCF
- 70 OUT FD,7:REM RECALIBRATE HEAD
- 80 OUT FD,1
- 90 FOR I=1 TO 500:NEXT I
- 100 PRINT "HEAD HAS NOW RECALIBRATED TO TRACK ZERO"
- 105 CLS
- 110 TRK=0
- 120 PRINT "HEAD IS NOW AT TRACK ";TRK
- 130 PRINT "PRESS RIGHT ARROW TO STEP IN, PRESS LEFT ARROW TO STEP OUT "
- 131 PRINT "OR PRESS DOWN ARROW TO RECALIBRATE"
- 140 KEY (13) ON
- 150 KEY (12) ON
- 160 OUT DOR,37
- 170 LOCATE 1,1
- 180 GOTO 120
- 190 END
- 250 TRK=TRK+1
- 255 IF TRK>39 THEN BEEP:TRK=39
- 260 GOSUB 300
- 265 RETURN
- 280 TRK=TRK-1
- 285 IF TRK<0 THEN BEEP:TRK=0
- 290 GOSUB 300
- 295 RETURN
- 300 KEY (13) OFF:KEY (12) OFF
- 301 OUT DOR,37
- 305 OUT FD,15
- 310 OUT FD,1
- 320 OUT FD,TRK
- 330 FOR I=1 TO 50:NEXT I
- 340 RETURN
- 400 OUT FD,7
- 410 OUT FD,1
- 415 TRK=0
- 420 FOR I=1 TO 500:NEXT I
- 430 RETURN
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