21 lines
250 B
ArmAsm
21 lines
250 B
ArmAsm
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.define Tne
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! This subroutine tests if the value in registerpair AX is
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! not equal to zero.
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! The value returned is in AX.
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Tne:
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tay
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beq 1f ! A = 0
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2: lda #0 ! AX <> 0
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ldx #1
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rts
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1: txa
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bne 2b ! X <> 0
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lda #0 ! AX = 0
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tax
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rts
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