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Languguage OS 2
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Languguage OS II Version 10-94 (Knowledge Media)(1994).ISO
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embedded
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mcu11
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hc11help.arc
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TONE.ASM
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Assembly Source File
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1987-10-12
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639b
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21 lines
* THIS IS A TONE GENERATOR TEST FILE
* FOR USE WITH THE M68HC11EVM EVALUATION MODULE
*
ORG $E500
*
*
START LDAA #$40 SET OC2 TO TOGGLE
STAA $1020 TCTL1
LDD $100E TCNT
STD $1018 TOC2 DELAY
LOOP1 LDAA #$40 CLEAR OC2 FLAG
STAA $1023 TFLG1
LDD $100E TCNT
ADDD #$03E8 SET FOR .5 MS DELAY
STD $1018 TOC2
LOOP2 LDAA $1023 TFLG1
BITA #$40 WAIT FOR OC2 FLAG
BNE LOOP1 THEN RESTART
BRA LOOP2