ADC 400F Especificações descarregar pdf (Página 21)

17

List 3 (Continued)

LINE LOC OBJ SOURCE

69 A * If MSB/LSB–first bit = 1 go to MSB

70 A F849 39 RETURN RTS

71 A *

72 A * S’routine stores MSByte in even address

73 A * LSByte in odd address

74 A * Channel 0 result in $30 and $31

75 A * Channel 1 result in $32 and $33 etc.

76 A * (Reserve addresses $30–$4B for results

77 A * of all channels)

78 A F84A A603 STORE LDAA PORTC,X

79 A F84C CE0030 LDX #$30

80 A F84F 97F2 STAA TEMP

81 A F851 86F0 LDAA #$F0

82 A F853 94F2 ANDA TEMP

83 A F855 46 RORA

84 A F856 46 RORA

85 A F857 46 RORA

86 A F858 46 RORA

87 A F859 16 TAB

88 A F85A 8602 LDAA #$02

89 A F85C 3D MUL

90 A F85D DDF2 STD TEMP

91 A F85F 96F0 LDAA MSBYTE

92 A F861 A7F2 STAA TEMP,X

93 A F863 08 INX

94 A F864 96F1 LDAA LSBYTE

95 A F866 A7F2 STAA TEMP,X

95 A F866 A7F2 STAA TEMP,X

96 A F868 39 RTS

97 A END

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