Re: ITT 2020
It wasn't botched, it was a "europeanised' Apple ][
The extra memory bit was added deliberately, I think for the 60Hz/50Hz frame difference between US and Europe so UK-spec displays could be used. There was extra RAM added for the extra bit required, but it was 'on the end' of the display space. Official ITT software, and things which didn't bypass the monitor (the BIOS, for the youngsters), worked fine. It was the Apple-specific programs, especially those which wrote directly to video RAM, which had every 9th bit blank. I vaguely remember at least one chess program like that. The 'official' software knew where to get that 9th bit's value from.
I remember a friend who went to the US on holiday to buy an Apple ][. Compuer + holiday cost him less than just buying the computer in the UK. A few years ago I was in a surplus store in California, where there was a big cardboard bin full of Apple ][s, going for $15 each. Sad...
I also know of one large UK Telco that, back in the early 80s, used an Apple ][ as the main link between a VAX and a telephone switchboard in their call centre. The switchboard console was connected via a serial line at some weird bitrate, and the apple serial card was the only thing they'd found that could be easily programmed to match it. It sat there for years without a problem, with the lid off to keep it cool, converting between 9600bit/s RS232 and the switchboard console.