hex dump of the stock PM3310 A4 card roms, both the 16k and 32k and the optional IEC card roms in Intel I8HEX / HEX-80 format
original Philips chip markings;
PM 3310 D403 4022 244 99214
PM 3310 D404 4022 244 99224
PM 3310 D406 4022 244 99234
4022 244 99251 (I.E.C. D402)
also check out the "modified" folder for a 40 years late update to the PM3310