Disk Masher System
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| − | '''DMS''' ('''Disk Masher System''') is a disk image format used on Amiga computers. | + | '''DMS''' ('''Disk Masher System''') is a compressed disk image format used on Amiga computers. |
| − | + | == Compression methods == | |
| + | {| class="wikitable" | ||
| + | ! ID !! Name !! Description and remarks | ||
| + | |- | ||
| + | | 0 || No compression || | ||
| + | |- | ||
| + | | 1 || Simple || [[Run-length encoding|RLE]] | ||
| + | |- | ||
| + | | 2 || Quick || RLE + {[[LZ77]] with 256-byte window} | ||
| + | |- | ||
| + | | 3 || Medium || RLE + {LZ77 with 16K window} | ||
| + | |- | ||
| + | | 4 || Deep || RLE + {[[LZ77 with Huffman coding|LZ77 with adaptive Huffman coding]]} | ||
| + | |- | ||
| + | | 5 || Heavy1 || Like Heavy2, with 4K window | ||
| + | |- | ||
| + | | 6 || Heavy2 || {Optional RLE} + {[[LZ77 with Huffman coding|LZ77 with static Huffman coding]], 8K window (similar to [[LHA]]'s "lh5" method)} | ||
| + | |- | ||
| + | | 7–9 || Heavy3–5? || Reserved? | ||
| + | |} | ||
== Identification == | == Identification == | ||
| − | Files begin with ASCII characters " | + | Files begin with ASCII characters "{{magic|DMS!}}". |
| + | |||
| + | == Format info == | ||
| + | * [http://lclevy.free.fr/amiga/DMS.txt DMS header structure] | ||
== Sample files == | == Sample files == | ||
* http://cd.textfiles.com/17b5/files/ | * http://cd.textfiles.com/17b5/files/ | ||
| + | * https://telparia.com/fileFormatSamples/archive/voyager.dms | ||
== Software == | == Software == | ||
| − | * [http://aminet.net/package/util/arc/xDMS xDMS] ( | + | * [http://aminet.net/package/util/arc/xDMS xDMS] (portable C source, partially public domain) |
* [http://aminet.net/package/util/arc/dms111 dms111] (Original Amiga software) | * [http://aminet.net/package/util/arc/dms111 dms111] (Original Amiga software) | ||
| + | * [https://github.com/temisu/ancient Ancient] (decompresses to [[ADF (Amiga)|ADF]]) | ||
| + | * [[The Unarchiver]] | ||
== Links == | == Links == | ||
Revision as of 13:17, 12 September 2020
DMS (Disk Masher System) is a compressed disk image format used on Amiga computers.
Contents |
Compression methods
| ID | Name | Description and remarks |
|---|---|---|
| 0 | No compression | |
| 1 | Simple | RLE |
| 2 | Quick | RLE + {LZ77 with 256-byte window} |
| 3 | Medium | RLE + {LZ77 with 16K window} |
| 4 | Deep | RLE + {LZ77 with adaptive Huffman coding} |
| 5 | Heavy1 | Like Heavy2, with 4K window |
| 6 | Heavy2 | {Optional RLE} + {LZ77 with static Huffman coding, 8K window (similar to LHA's "lh5" method)} |
| 7–9 | Heavy3–5? | Reserved? |
Identification
Files begin with ASCII characters "DMS!".
Format info
Sample files
Software
- xDMS (portable C source, partially public domain)
- dms111 (Original Amiga software)
- Ancient (decompresses to ADF)
- The Unarchiver
