TTCOMP
From Just Solve the File Format Problem
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== Sample files == | == Sample files == | ||
* [https://archive.org/details/UniversalDialUPModemDriverCD Universal Dial UP Modem Driver CD] → SOFTWARE/BITWARE/.../*.??$ | * [https://archive.org/details/UniversalDialUPModemDriverCD Universal Dial UP Modem Driver CD] → SOFTWARE/BITWARE/.../*.??$ | ||
| − | * https://telparia.com/fileFormatSamples/archive/quickgif.__d | + | * https://telparia.com/fileFormatSamples/archive/ttcomp/quickgif.__d |
Revision as of 20:17, 26 July 2020
TTComp archive is a compressed file format. It was apparently used by some software installation utilities. It uses PKWARE DCL Implode compression.
Though it may be called an "archive" format, it appears to store nothing more than a stream of compressed data.
Identification
The first byte of a TTComp file indicates the type of compression:
-
0x00: binary compression -
0x01: ASCII compression
The second byte of a TTComp file specifies the size of the dictionary as follows:
-
0x04: 1024 bytes -
0x05: 2048 bytes -
0x06: 4096 bytes
Most TTComp files begin with bytes 0x00 0x06 indicating binary compression and a 4K dictionary.
Software
Sample files
- Universal Dial UP Modem Driver CD → SOFTWARE/BITWARE/.../*.??$
- https://telparia.com/fileFormatSamples/archive/ttcomp/quickgif.__d
