Hello, > As far as I can determine, there was only one version of DOS 1, > although Commodore's documentation referred to it variously as DOS > 1.0 and 1.2. I've read at the Book "Programming the PET/CBM" from Raeto West. The author differ between DOS 1 (2040) and DOS 1.2 (3040). He also show the difference about the digital main board. The 2040 board with DOS 1 is _not_ upgradeable. Only the newer 3040 board is upgradable from DOS 1.2 to 2.1. The other point is, there exists a 901468-05. This must be an earlier version of the 901468-07 (High ROM). And now you can combine what's about the numbers -01 and -02 or -03 and -04. Or if i remember correctly, there exists many early version of 2040 with so many bugs, that there are not usable. Are this the version -01/-02 or -03/-04? > The power up message on the drive says only DOS, and does not give a > number. That's the problem. Starting with DOS 2.5 the correct DOS version is reported. What's about the DOS 2.0 for 4040? There exists two version. Is the revisited version the DOS 2.1? Did anyone own the commodore tech topics from 1979? This must be the year with the info we needed ... Martin Message was sent through the cbm-hackers mailing listReceived on 2014-04-10 16:00:07
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