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CODE S= EXX, ( protect BC )
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DE POP, HL POP, chkPS,
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LDA(DE),
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(HL) CPr,
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IFZ, ( same size? )
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B A LDrr, ( loop A times )
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BEGIN,
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HL INCd, DE INCd,
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LDA(DE),
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(HL) CPr,
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JRNZ, BREAK, ( not equal? break early. NZ is set. )
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DJNZ, AGAIN,
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THEN,
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PUSHZ,
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EXX, ( unprotect BC ) ;CODE
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