On Sat, 27 Dec 2014, William Levak wrote: > On Sat, 27 Dec 2014, Ruud@Baltissen.org wrote: > >> Hallo William, >> >> >>> Where does this part number come from? >> >> It is on this page of Bo's site: >> >> http://www.zimmers.net/anonftp/pub/cbm/firmware/drives/new/1541/inde >> x.html > > That's the second one I missed. > > That's a strange part number. Commodore had stopped using that series of > numbers by the time the 1541-II was released. Was this a pre-release version > or prototype?? I did comparisons of all the later 1541 ROMs. The results are illustrated by the chart below. The lines indicate comparisons with the least number of different bytes. The length of the line indicates the approximate number of bytes different. 325302-01, 901229-05 | --------------325302-01, 901229-06-------------- | | | | | | | 251968-01 | | | | | | | 251968-03 | | 251968-02 901229-06 seems to be the point from which all subsequent versions are derived independently. wlevak@sdf.lonestar.org SDF Public Access UNIX System - http://sdf.lonestar.org Message was sent through the cbm-hackers mailing listReceived on 2014-12-29 06:00:03
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