The following bytes were changed from the alternate ROM (checksum 45C3145E):

000000DC: Changed to 0x75 (one higher than alternate)
         000000DE: Changed to 0x7B (one higher than alternate)
         00000146: Changed to 0x71 (one higher than alternate)
         000001B2: Changed to 0x7D (one higher than alternate)
0007FFE8,0007FFEA: Changed ROM checksum to 44C3115E

The changes consist of "illegal opcodes", that were implemented in emulated systems since 1997. 3.x ROMs included in newer versions of Amiga Forever (2006 and later) do not use "illegal opcodes".