Re: yet another compress question - VMS

This is a discussion on Re: yet another compress question - VMS ; From: parnold@bellfruitgames.co.uk > I need to decompress some files which where compressed using a program > called 'compress' which we were running on a vax/vms system in the > early 90's. > Unfortunately we no longer have a fax and ...

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Thread: Re: yet another compress question

  1. Re: yet another compress question

    From: parnold@bellfruitgames.co.uk

    > I need to decompress some files which where compressed using a program
    > called 'compress' which we were running on a vax/vms system in the
    > early 90's.
    > Unfortunately we no longer have a fax and I'm unable to find any
    > program which will decompress the files.
    > Looking into the files shows the first two bytes as 1F 9E whereas 1F
    > 9D seems to be common for the compression utils I've found so far.
    >
    > Does anyone know of anything which can decompress these files
    > (preferably running under dos but linux would be ok too.


    What's a typical file name? Did you explore "mam compress" on Linux?
    Seeing more than the first two bytes of a file might be more useful than
    just that.

    ------------------------------------------------------------------------

    Steven M. Schweda sms@antinode-org
    382 South Warwick Street (+1) 651-699-9818
    Saint Paul MN 55105-2547

  2. Re: yet another compress question

    >
    > * *What's a typical file name? *Did you explore "mam compress" on Linux?
    > Seeing more than the first two bytes of a file might be more useful than
    > just that.
    >

    Thanks for your reply.

    I don't think the filenames don't help as it seems we named them
    ourselves.
    So, readme.txt would become readme.txtcmp etc.

    I believe compress on linux as been investigated but I've only just
    been
    drafted in on this as the original person is away.

    The first few bytes from one file are show below.
    My limited understand of this is that the first two bytes are
    typically a header.
    eg, 1F 8B is used by gzip files. 1F 9D by some lzw compressed files
    From the files I've got the first 31 bytes are the same, not that I
    think
    that helps at all.

    Thanks for your time.
    Paul

    1f 9e 90 05 01 01 00 00 00 00 00 00 00 76 da cc
    21 11 86 0e 1d 39 69 c4 d4 a1 53 66 0e 88 1b 36
    70 ec 18 98 84 48 11 27 54 12 88 88 71 a3 45 10
    28 52 5a c4 c8 91 23 06 88 18 35 74 c0 c0 a1 43
    86 0c 10 32 ad 04 c1 f2 c2 4a 93 29 20 8c 10 61
    42 e2 48 c6 22 52 82 50 29 02 42 ca 9b 87 69 dc
    94 11 b1 63 c7 94 2c 53 8a 36 d9 91 60 ca 93 2a
    52 86 18 95 e9 f5 2b 58 af 34 6d e2 9c f2 d4 48
    12 26 45 ac 06 61 c2 e4 c9 10 a2 49 9e 38 09 6b
    37 25 8e 1c 56 85 14 99 fa 85 8a 94 2c 5f 86 d0
    a5 92 e4 48 95 ac 3a bf ba 79 b3 b7 ca 90 25 45
    a8 7c 99 92 44 4b d7 bb 5e 61 58 25 ac f1 70 e2
    2a 8b 35 7b 6d 6c 15 a3 11 a1 52 8a 10 f9 72 45
    4a 92 a2 a4 4d 27 28 82 a5 a8 13 cb 74 49 83 e5
    9c e0 c8 5b 21 6d bf 08 a9 62 24 b5 94 c1 59 35
    f6 b6 da 84 b2 90 b7 91 2b 5f ce 7c b7 46 0c 19

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