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/ Languguage OS 2 / Languguage OS II Version 10-94 (Knowledge Media)(1994).ISO / language / embedded / mcu11 / hc11help.arc / TONEVB.ASM < prev   
Assembly Source File  |  1987-10-12  |  638b  |  21 lines
  1. * THIS IS A TONE GENERATOR TEST FILE
  2. * FOR USE WITH THE M68HC11EVB EVALUATION BOARD
  3. *
  4.  
  5.          ORG       $C000
  6. *
  7. *
  8. START    LDAA      #$40      SET OC2 TO TOGGLE
  9.          STAA      $1020     TCTL1
  10.          LDD       $100E     TCNT
  11.          STD       $1018     TOC2 DELAY
  12. LOOP1    LDAA      #$40      CLEAR OC2 FLAG
  13.          STAA      $1023     TFLG1
  14.          LDD       $100E     TCNT
  15.          ADDD      #$03E8    SET FOR .5 MS DELAY
  16.          STD       $1018     TOC2
  17. LOOP2    LDAA      $1023     TFLG1
  18.          BITA      #$40      WAIT FOR OC2 FLAG
  19.          BNE       LOOP1     THEN RESTART
  20.          BRA       LOOP2
  21.