See all articles from Syntax/Syntax ZX80 v5 n10
Some things turn out more useful than you would at first think – this card is one of them. When I first got it, I stuck it on the 2068 test setup—what harm could it do? But I shift computers all day using the entire Sinclair family plus Osbornes and TRS-80’s. I save a few minutes each time I use the 2068 by finding functions without scanning the whole keyboard twice.