On Sun 26 May 2013 at 10:02:54 +1000, Julian Perry wrote: > AS I had recalled, "Inside Commodore DOS" by Immers & Neufield > confirms the bug. (I remember seeing it myself) > Apparently there are 2 bugs. > One: the "referred blocks" occasionally will give you track 18 (!) > Two: if a B-A is given to an already existing block, the error channel > will return the next free block, but allocate all blocks on the > requested track! (which is what you're seeing) That probably happens because the cached part of the BAM for that track is not written back. Normally, when a track's BAM is manipulated, it is copied from the disk sector to a special cache location. While it is there, the disk sector has that track's BAM cleared for safety. It seems likely (which means: I haven't checked this at all) that in the error case, the cached BAM part is simply never put back in the disk sector. So you end up with a fully allocated track. -Olaf. -- ___ Olaf 'Rhialto' Seibert -- The Doctor: No, 'eureka' is Greek for \X/ rhialto/at/xs4all.nl -- 'this bath is too hot.' Message was sent through the cbm-hackers mailing listReceived on 2013-05-26 18:00:03
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