ICD MIO ROM variants? Dump yours!
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
Attached is my copy, it identifies itself as:
Multi IO Disk Cache v2.6
Copyright 1991 by Craig Carter
All rights are reserved.
Was there ever a documentation text file to go along with this? Would love to obtain it... I always wondered if I reserved more than 32K for it if it was actually utilized...
Also attached are two commands that were useful with SpartaDos 3.3 to temporarily change the DOS signature/version number at $700/$701 to 3.2 and back to 3.3, otherwise MIOCAC
