PC/Apple/etc. Cards Worth Keeping/Storing

Tony Duell wrote: Well, nothing that probably already hasn't been stated before -- I know the specifications of the Motorola 6845 and how it works, and I know that the tech ref documents each CRTC register, etc... what I'm looking for is stuff that probably isn't in the tech ref, like "what are the invalid settings for each register", etc as implemented on the CGA. I say this because, to prove a point to a few of my colleages, I'm writing a program that does unholy things with CGA that it were probably never intended by the hardware designers. In addition to writing code for "approved" uses like 160x200x16 (composite) and the "third" red-cyan-white palette (disable color burst), I'm trying to see just how much it can do. I've got working code for 160x100x16 (tweaked text), 60Hz full-screen horizontal scrolling via the address CRTC registers, all 16 colors onscreen in all graphics modes, etc. but I recall some rumors about 256-byte-wide modes, undoing the display memory interleaving, and some other stuff that I can't confirm/deny. In other words, stuff that the MC6845 can do but the hardware implementation of CGA can't (or can if doing something "undocumented"!). -- Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/ Want to help an ambitious games project? http://www.mobygames.com/ Or check out some trippy MindCandy at http://www.mindcandydvd.com/