@deanb01 Re: Display Memory
It's also possible to fool the display routines into producing a pseudo high-resolution image.
In the days of the 8-bit (and I think 16 bit) home computers, the hardware was simpler and usually well documented so you could perform all sorts of tricks way beyond what the manufacturer originally intended. That's why emulating a lot of this hardware is quite hard as you have to emulate the chips to a very precise level to allow those hacks to work. See this Ars Technica article about the difficulty of doing accurate emulation.
Biting the hand that feeds IT
