Awesome
aplibsharp
aplibsharp is an open source version of Jørgen Ibsen's aPLib compression library.
The goal of aplibsharp is to approach* maximum compression ratio within the constraints of the aPLib format.
Directory structure
| Directory | Description |
|---|---|
| aplib | the compression library |
| appack | console application |
| cap | c64 specific console application |
| depackers | depackers for various architectures |
appack usage
Compress file:
appack e infile outfile
Decompress file:
appack d infile outfile
cap usage
Compress file:
cap e infile outfile
Decompress file:
cap d infile outfile
Compress executable ($0200–$FFF?)**
cap x --s=64738 --c=55 --i=1 inprg outprg
Flags:
-s - jump address
-c - cpu port register
-i - interrupt flag
Flags supports decimal and 0x-prefixed hexadecimal values.
License
aplibsharp, appack and cap are released under the MIT license.
Depackers are Copyright © of the respective authors
Credits
Suffix Array by Yuta Mori
z80 depacker by Antonio José Villena Godoy
Notes
(*) Two constants needs to be edited in aplib/constant.cs to actually reach optimal compression ratio. By default these are set to shorten encoding time. File size increase is usually about a pcm due to this.
(**) Care need to be taken when compressing c64 files near top of memory. Incompressible data might cause source and destination to intersect during decompression.
This library has been tested quite extensively. Please contact me should you find a file that doesn't compress correctly using this library.