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43 lines
2.1 KiB
Plaintext
43 lines
2.1 KiB
Plaintext
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*** CKIT (Compression KIT compressed files)
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*** Document revision: 1.3
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*** Last updated: March 11, 2004
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*** Compiler/Editor: Peter Schepers
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*** Contributors/sources: Paul David Doherty,
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Todd Elliott
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Written by Eugene F. Barker and Ryan Vander Stoep, this archiver does
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whole-disk archiving from the various Commodore drives (1541/1571/1581), as
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well as the larger CMD drives (hard disks). The latest known version is
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"CKIT-94", meaning it was released in 1994. The compressor program is
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commercial and dongle protected, but the decompressor is publically
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available. From reports I have received the compression used is RLE, which
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is not generally very good and it is also not very fast. One point in
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CKIT's favor is that it supports all the presently available storage
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devices (CMD hard disks, Commodore 15xx floppy drives).
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The file extension for single disk files (i.e. when a compressed disk
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archive only takes up one archive file) is "C4-". If an compressed archive
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takes more than 1 file, the extension changes to "C4A" for the first and
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"C`A" for the second. I do not know what the extensions will be for
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compressed files taking more than two files, but CKIT does allow for an
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archive to span up to 27 disks.
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The header of the compressed file always starts with the string "MMS"
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(with a space and $00 null termination) which stands for "Mad Man
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Software", the company which makes the product.
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00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F ASCII
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----------------------------------------------- ----------------
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0000: 4D 4D 53 20 00 58 58 21 90 89 A0 00 60 00 04 00 MMS<4D><53>XX!<21><><EFBFBD><EFBFBD>`<60>.<2E>
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0010: 00 29 5A EC 94 03 40 06 20 2F BF D5 20 B4 68 81 <20>)Z<><5A>.@.<2E>/<2F><><EFBFBD><EFBFBD>h<EFBFBD>
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0020: A0 8D 10 B4 10 AF 15 03 61 08 07 50 00 10 80 68 <20><>.<2E>.<2E>..a..P<>.<2E>h
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0030: 8A 88 08 91 03 32 1A 0F B7 30 1D 94 D0 7B 28 80 <20><>.<2E>.2..<2E>0.<2E><>{(<28>
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Byte: $0000-0004 - ASCII string "MMS " with null termination.
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0005-0006 - Original Disk ID
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0007-???? - Compressed data
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Any other information on this format would be greatly appreciated.
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