but the performance of that left something to be desired before we could reach c64 SID type levels while loading tape...
after alot of headbreaking and back/forth discussion with numerous ppl (thank you John Kowalski for pointing me in the *simple* direction and Sorchard for his assistance)....
standard tape format can now be loaded whilst playing pattern based music at around 11Khz...
this is a capture of the 64K coco II loading 20K of code while playing music:
http://www.roust-it.dk/coco/4k/loader.mp3
this uses the 58byte pattern based player i cooked
/Simon
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