I downloaded the "Ralph Brown Interrupt List" in the "before internet" time, from my local BBS. IIRC, the whole thing took about a week or two of effort on my

I downloaded the "Ralph Brown Interrupt List" in the "before internet" time, from my local BBS. IIRC, the whole thing took about a week or two of effort on my 2400 Baud modem, and limited phone time. With it, I was able to write a mouse "driver" in QBasic, that I used for my HS programming assignment -- we had to prompt the user with math problems and then read the input back. I implemented a "simple" text GUI with mouse support. I was a bit of a show off back then..