Mmm, the screenshots bring back memories... a place I worked in the early 80s (right around when you could still look at the IBM PC and plausibly predict that e

Mmm, the screenshots bring back memories... a place I worked in the early 80s (right around when you could still look at the IBM PC and plausibly predict that even with all of IBM behind it, it just wasn't going to work out, it got so many things wrong, and was so slow compared to older hardware... no really, we believed that) we did a lot of ludicrous things with an IMSAI. One of them was WordStar split-screen mode - you could open a second file - read-only - on the upper part of the screen, scroll through it with a subset of wordstar keys, and hit something to swap back and forth (I forget what, we had serial terminals with a lot of function keys back then, and brightly colored wordstar labels for them.) The trick was that wordstar had a documented hook for "custom" display drivers and keyboard drivers... so we could easily lie to wordstar that the screen was shorter, and edit the cursor movement sequences to all have an offset, so it would draw on the lower 2/3 of the screen and we had the upper 1/3 for our shenanigans. This was a couple of years before I first used emacs. (Also, I am sort of amazed that we got paid to do it - very cheap highschool student interns basically, so there were a lot of outright anti-economic aspects of the whole thing. Loads of fun though :-)