My Magic Sac 1 cartridge for the Atari ST has two
Macintosh ROMs inside: 342-0220-A and 342-0221-A.
Does anyone know what Macintosh they go to?
I can answer that from memory. :-) They're the original Macintosh ROMs
(AKA "64K ROM", referring to the ROM size -- the "128K ROM" is never
found in a Macintosh 128).
There's a handy table of ROM part numbers at:
http://homepage2.nifty.com/tamaru/Tips/ROM/rom.html