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35 lines
1.1 KiB
Plaintext
35 lines
1.1 KiB
Plaintext
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; C02 dirent.h02 Assembly Language Subroutines
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; Requires external functions ...
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; external zero page locations ...
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; and external locations ...
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;opndir() - Open Directory for Reading
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;Args: A = Drive Identifier
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; Y,X = Pointer to Directory Name
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;Returns: A = File Pointer (0 = Not Opened)
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; Y = Error Code (0 = None)
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OPNDIR: ;Return Error - Not Implemented (fall through)
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;rdhdr() - Read Directory Header
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;Note: Call once before first readdir
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;Args: A = Directory File Pointer
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; Y,X = Pointer to HDRENT buffer
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;Returns: A = Length of Header (0=None)
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; Y = Error Code (0=None)
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RDHDR: ;Return Error - Not Implemented (fall through)
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;rddir() - Read Directory Entry
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;Args: A = Directory File Pointer
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; Y,X = Pointer to dirent structure
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;Returns: A = Length of Entry (0=None)
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; Y = Error Cooe (0=None)
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RDDIR: LDA #$00 ;Return Result - None
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LDY #$FF ;and Error - Not Implemented
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RTS
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;clsdir() - Close Directory File
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;Args: A = Directory File Pointer
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;Returns: A = Error Code (0 = Success)
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CLSDIR: LDA #$FF ;Return Error - Not Implemented
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RTS
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