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a2jer

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  1. The file is just dumped in DOS-order, as opposed to ProDOS order. In ProDOS order, the directory block 2 would start at offset 0x400 in the file, but with DOS-order it starts at 0xB00. Basically, within each track, the 256-byte sectors are rearranged as 0, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 15, which means ProDOS blocks 0-7 are composed of sectors:

    block 0: 0, 14

    block 1: 13, 12

    block 2: 11, 10

    block 3: 9, 8

    block 4: 7, 6

    block 5: 5, 4

    block 6: 3, 2

    block 7: 1, 15

     

    I'm surprised Ciderpress doesn't recognize it.

     

    Here's the catalog:

    /EXAMPLES
    *PRODOS SYS $2000 30 14848 1984-Sep-18 00:00
    *BASIC.SYSTEM SYS $2000 21 10240 1984-Jun-18 00:00
    *STARTUP BAS $0801 7 2794 1984-Jul-26 09:12
    *HELP BIN $2000 5 1537 1983-Oct-01 00:00
    *HELPSCREENS TXT $0200 60 12358656 1983-Oct-01 00:00
    *PRACTICE DIR 1 512 1983-Oct-01 00:00
    *PROGRAMS DIR 3 1536 1983-Oct-01 00:00
    *DATA DIR 1 512 1987-Oct-16 23:11
    *EXTRAS DIR 1 512 1983-Oct-01 00:00
    *DIRECTORY DIR 1 512 1983-Oct-01 00:00
    Free space: 34 blocks

    Yes, HELPSCREENS is a sparse file.

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