[vidarh]

For anyone who wants non-paper versions of stuff like this (focused on Amiga and 8-bit Commodore computers, but there's also a bunch of more generic stuff, and 6502/68000 material): http://www.bombjack.org/commodore/

Also, the M68k programming manuals should still be downloadable from FreeScale (what used to be Motorola's semiconductor division). At least they were when I looked for the last a year ago or so. They are wonderfully clear and detailed.