ADTPro 1.0.4 released - rudimenary nibble disk transfer

["DavidSchmidt" <davidschmidt@a2central.com.remove-zbw-this>]

ADTPro has been updated with some excellent contributions and some otherwise 
mundane bug fixes.

First, Gerard Putter's code to do nibble and halftrack disk creation and 
transfer has been incorporated into the ADTPro server.  Since research is 
actively going on in that area, the client to do the nibble extraction has 
only been incorporated into the (included) DOS ADT program, now bumped to 
version 2.2.  Gerard and I collaborated to make a DOS ADT client that was 
compatible with the latest ADTPro server as well has his A2V2 transfer 
program, part of the Virtual ][ emulator running on OSX.

Importantly, the nibble read scheme isn't nearly as tailorable as EDD/SST, so 
it isn't as capable at capturing tricky disk encoding schemes.  I'll point you 
to related discussions going on in this newsgroup for more details.  But I 
wanted to get the work that Gerard has done so far into the hands of more 
people to further the cause.

Another contribution came from Marc S. Re�l in the form of a more disciplined 
audio stream decoder. The result is more reliable (i.e. faster because of 
fewer retransmits) audio transfers.  I also took his advice and implemented an 
audio device selector, but it was mooted by Apple finally fixing its OSX Java 
audio implementation in the mean time.

Other assorted bug fixes were in the audio area, better autodetection of IIc 
serial (anybody want to lend me their IIc+?) and fixed progressive backoff 
timing.

http://adtpro.sourceforge.net
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