2018-07-14 19:31:57 +00:00
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open/seek/read/write any binary file in ProDOS filesystem.<br>
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runs from any directory on floppy or hard disk.<br>
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searches the file system for the requested file, can even look inside subdirectories.<br>
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can simulate DOS 3.3 RWTS (including format) to allow disk images on the hard disk, and multiple sides in the same file.<br>
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can read sparse files, and read and write tree files<br>
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<br>
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usage:<br>
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<br>
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jsr init ;one-time call to unhook ProDOS, detect drive type, and relocate code if needed<br>
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<br>
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;open and read bytes from a file without address override or writing enabled<br>
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lda #<file_to_read<br>
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sta namlo<br>
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lda #>file_to_read<br>
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sta namhi<br>
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2018-08-28 04:10:10 +00:00
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lda #6 ;bytes<br>
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sta sizelo<br>
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lda #0<br>
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sta sizehi<br>
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2018-07-14 19:31:57 +00:00
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jsr opendir ;open and read file into memory at its load address<br>
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<br>
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;write to an open file with address override<br>
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lda #<file_to_write<br>
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sta namlo<br>
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lda #>file_to_write<br>
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sta namhi<br>
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lda #0<br>
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sta sizelo<br>
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lda #>bytes_to_write<br>
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sta sizehi<br>
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lda #<place_to_write<br>
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sta adrlo<br>
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lda #>place_to_write<br>
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sta adrhi<br>
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lda #cmdwrite<br>
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sta reqcmd<br>
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jsr rdwrpart ;write bytes from memory to specified load address<br>
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<br>
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<br>
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format of request name is Pascal-style (length, text):<br>
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e.g. !raw 5, "MYDIR" or !raw 6, "MYFILE" or !raw 14, "QKUMBAROXURSOX"
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