work towards directory reading in CBDOS
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@@ -16,6 +16,24 @@ dos_MEMCHK:
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dex
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bpl @1
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; Check if helper code is undamaged
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lda #$AD
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cmp code_LDA_01
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bne @fail
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cmp code_LDA_02
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bne @fail
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cmp code_LDA_03
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bne @fail
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lda #$60
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cmp code_RTS_01
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bne @fail
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cmp code_RTS_02
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bne @fail
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cmp code_RTS_03
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bne @fail
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clc
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rts
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