Hello Frank, * On Wed, Nov 15, 2017 at 09:29:51PM +0100 Francesco Messineo wrote: > On Wed, Nov 15, 2017 at 9:13 PM, Spiro Trikaliotis > <ml-cbmhackers@trikaliotis.net> wrote: [...] > > Is the difference between the two formats known and documented? > > http://www.6502.org/users/andre/petindex/drives/drives.html that page links to > http://www.6502.org/users/andre/petindex/drives/writegap.html The information of the latest link is known to me. Have you noticed who gathered the information for the parts "CBM-Hackers summary" and "CBM-Hackers discussion"? ;) > according to these pages, [23]040 DOS has more blocks in one track zone. Unfortunately, it does not give any details about which speed zone has an additional block. Ok, let's have a look. 2040 format has 670 blocks, 4040 format has 664 blocks. The difference is 6 blocks. Speed zones: 1-17: would give 17 extra blocks: negative 18-24: would give 7 extra blocks: negative 25-30: would give 6 extra blocks: positive 31-35: would give 5 extra blocks: negative Thus, it seems that the speed zone of the tracks 25 to 30 contained an extra block. Regards, Spiro. -- Spiro R. Trikaliotis http://www.trikaliotis.net/ Message was sent through the cbm-hackers mailing listReceived on 2017-11-15 21:05:11
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