rename "sp" to "spc", avoid conflict with 4510 opcodes
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@@ -5,18 +5,18 @@
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;
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.export decsp4
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.importzp sp
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.importzp spc
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.proc decsp4
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lda sp
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lda spc
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sec
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sbc #4
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sta sp
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sta spc
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bcc @L1
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rts
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@L1: dec sp+1
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@L1: dec spc+1
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rts
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.endproc
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