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Almathera Ten Pack 3: CDPD 3
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Almathera Ten on Ten - Disc 3: CDPD3.iso
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076-100
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scopedisk100
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lhwarp
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changes.doc
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1995-03-19
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LHWARP 1.03
A disk tracker for the Amiga
Written by Jonathan Forbes
Copyright © Xenomiga Technology, 1990
Version 1.01
Lhwarp 1.0 has a tiny bug, in that it won't output all of the extended
sector data. Lhwarp 1.01 has fixed this bug, but has caused itself to be
compatible with Lhwarp 1.0. Lhwarp 1.01 will produce smaller files than
Lhwarp 1.0, because it now stores the extended sector data as part of the
track data, for compression purposes.
The sudden update shouldn't be too much trouble, because Lhwarp 1.0 was
released less than 6 hours ago. Please delete the original Lhwarp 1.0 if
you have it, and use Lhwarp 1.01 in its place.
Version 1.02
Lhwarp 1.02 has implemented a checksum, so that corrupted tracks can be
reported. Version 1.02 is fully backwards compatible with version 1.01.
Version 1.03
Lhwarp 1.03 uses only one track's worth of CHIP RAM (11k), for all its
reading and writing to disk. Data is copied from the CHIP RAM disk buffer
to FAST RAM (or, if you don't have FAST RAM, some more CHIP RAM.) All
compression and decompression is now done in FAST RAM, if possible, so
compression time might possibly be smaller.
Versions 1.00, 1.01 and 1.02 crashed often, most probably due to lack of
stack space. Since my stack is permanently set to 90,000 bytes, I never
noticed, and neither did anyone else with a large stack.
Version 1.03 now allocates almost memory from Exec's free list, rather
than using large auto arrays (the latter being a very bad programming
practice anyway.) Stack size requirements have dropped by about 50k or so,
to hopefully around 3k, but you may wish to use more (say, 10k), just to be
safe.
Support for RAW unencoded MFM data will be implemented soon. An option to
append MFM data to an existing file will be provided.
If you have any suggestions, contact me soon, so that they will be
implemented quickly.