My dad read my earlier journal entry on the computers I’ve used and provided more info on his Superboard II:
By the way, our first computer was an Ohio Scientific Superboard II, as far as I know there was never a “III”. It had 24K of ROM and 4k of static RAM, later expanded to a whopping 7k. Data storage was on cassette tapes. It had a 6510 8 bit processor (Update: Think he actually meant 6502) clocking over at a cool 1mhz. It had a keyboard built in and output NTSC B&W video. It had built in 8k Microsoft BASIC in ROM, as I recall I remember seeing Bill Gates name in the code when I did a hex dump of the ROM. It also had a bug in the string garbage collector that would crash the computer after basic was used for a while – thanks Bill.
Update: My dad also found this page with some more Superboard info as well as links to software and an emulator!