The following bytes were changed from the original ROM (checksum 2A0F15A9):
00000605-00000607: Changed to 0x27FF9A (jump to cache clear code?)
00017F5B-00017F5C: Changed initial CLI dimensions to 0x3536 (640x256)
0006A942-0006A944: Changed Kickstart version text to "Plus"
0006B92D: Changed to 0xEB to activate NoClick
0007FF90-0007FF4B: Inserted the following block of code (clear caches?):
4C DF 41 01 4E F9 00 20 0B 50 48 E7 80 82 2C 78
00 04 08 2E 00 00 01 29 67 E6 20 6F 00 0E 30 10
02 40 FF C0 0C 40 40 C0 66 D6 00 10 00 02 08 2E
00 01 01 29 67 10 4E 7B 88 02 4E 7A 00 02 08 C0
00 02 4E 7B 00 02 4C DF 41 01 4E 73
0007FFE8-0007FFEB: Changed ROM checksum to E66F399A