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37 lines
642 B
Plaintext
37 lines
642 B
Plaintext
;license:MIT
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;(c) 2018 by 4am
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;
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; Sound routines
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;
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; Public functions
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; - SoftBell
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;
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WAIT = $FCA8
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SPEAKER = $C030
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;------------------------------------------------------------------------------
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; SoftBell
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;
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; in: none
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; out: all registers preserved
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; all flags clobbered
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;------------------------------------------------------------------------------
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SoftBell
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php
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phx
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pha
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ldx #32
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- lda #2
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jsr WAIT
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bit SPEAKER
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lda #33
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jsr WAIT
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bit SPEAKER
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dex
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bne -
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pla
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plx
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plp
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rts
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