Disk Masher System
From Just Solve the File Format Problem
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| 1 || Simple || [[Run-length encoding|RLE]] | | 1 || Simple || [[Run-length encoding|RLE]] | ||
|- | |- | ||
| − | | 2 || Quick || RLE | + | | 2 || Quick || RLE {[[LZ77]] with 256-byte window} |
|- | |- | ||
| − | | 3 || Medium || RLE | + | | 3 || Medium || RLE {LZ77 with 16K window} |
|- | |- | ||
| − | | 4 || Deep || RLE | + | | 4 || Deep || RLE {[[LZ77 with Huffman coding|LZ77 with adaptive Huffman coding]]} |
|- | |- | ||
| 5 || Heavy1 || Like Heavy2, with 4K window | | 5 || Heavy1 || Like Heavy2, with 4K window | ||
|- | |- | ||
| − | | 6 || Heavy2 || {Optional RLE} | + | | 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? | | 7–9 || Heavy3–5? || Reserved? | ||
| Line 58: | Line 58: | ||
Various: | Various: | ||
* {{CdTextfilesURL|17b5/files/}} | * {{CdTextfilesURL|17b5/files/}} | ||
| − | * | + | * {{DexvertSamples|archive/dms}} |
== Software == | == Software == | ||
| Line 66: | Line 66: | ||
* [[The Unarchiver]] | * [[The Unarchiver]] | ||
* {{Deark}} | * {{Deark}} | ||
| + | * {{XAD}} | ||
== Links == | == Links == | ||
Latest revision as of 10:46, 12 April 2024
DMS (Disk Masher System) is a compressed disk image format used on Amiga computers.
Contents |
[edit] 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? |
[edit] Identification
Files begin with ASCII characters "DMS!".
[edit] Format info
[edit] Sample files
Uncompressed (0):
- Zoom Volume One → proclip/TH22A.DMS
Simple/RLE (1):
- Aminet CD-ROM #1 → AMINET/DEMO/SOUND/VIBRATIONS_ZNT.DMS
Quick (2):
- FAIRLIGHT 10 YEARS → FAIRLIGHT_10_YEARS.zip → FAIRLIGHT_10_YEA.{BIN,CUE} → FLTAMIGA/FLT1991/BOMBJACK.DMS
Medium (3):
- Aminet CD-ROM #1 → AB20/DEMOS/COMERCIL/KNGHTSFT.DMS
Deep (4):
- Aminet CD-ROM #1 → AMINET/DEMO/EURO/ODYSEY92.DMS
Heavy1 (5):
- Utilities Professional 1-1500 CD-ROM → 00010250/VAR0128.DMS
Heavy2 (6):
- Aminet CD-ROM #1 → AMINET/DEMO/EURO/CMD_TP5B.DMS
Various:
[edit] Software
- xDMS (portable C source, partially public domain)
- dms111 (Original Amiga software)
- Ancient (decompresses to ADF)
- The Unarchiver
- Deark
- XAD framework
