So, until today I thought the old ICD MIO's only had one ROM version - 1.1. I dumped the ROM from the two 'original' MIO's I have, and found they were slightly different.   First up, my 1MB MIO: Serial # 0953 27128 EPROM labelled "MIO v1.1m" - date code = June 1986 CRC32 = 00694A74 - which matches "MIO11OS.BIN" on pigwa   Next, my friends 256K MIO: Serial # 1569 cat27128ap (Catalyst EEPROM) - date code = July 1987 CRC32 = 7D68F07B