On Mon, 30 Jul 2001, Spiro Trikaliotis wrote: > I'll have a look at it, but I think I remember the checksum is build over > *both* ROMs, isn't it? Nope. The $c000-$dfff ROM (325302-01; the same in the 1540 and the 1541) sums up to $c0, while the $e000-$ffff ROM sums up to $e0. A comparison between the 325302-01 and the lower part of the 251968-03 (1541-II firmware) reveals quite a few changes, including the introduction of a copyright message. I just had a look at the differences, but could not find any obvious place for the checksum. Marko Message was sent through the cbm-hackers mailing list
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