Hammer (compression)
From Just Solve the File Format Problem
Hammer (sometimes abbreviated HMR) is a compressed file format used by the RISC OS games Asylum and Oddball. The format and the games were developed by Andy Southgate.
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Identification
Files begin with ASCII "Hmr", followed by a byte with value 0x00 or 0x01.
Files with 0x01 at offset 3 use a slightly different compression scheme, and are apparently expected to decompress to a FastSpr sprite file.
Specifications
Software
- nobrainer (Includes RISC OS binary, and portable source code.)
- Hammer Decompressor
Sample files
- dexvert samples — archive/hammer
- Asylum → asy202.zip → ... (e.g. AsyNu/!Asylum/!Id/{Brain,FSPAliens})
