Test all RAM modules on the Apple II

Maybe once the FloppyEmu arrives, I can test this, since until #4 is complete, we can't read off a floppy disk.

There's a program [RAM test Utility v1.4](https://www.ivanhogan.com/kfest/MemUtil/) aka KansasFest MemUtil, which should test each address in RAM to verify full functionality.

There's also @misterblack1's [Apple \]\[ Dead Test RAM Diagnostic ROM](https://github.com/misterblack1/appleII_deadtest), however that requires programming a ROM chip, which is a process I'm less familiar with.

Then there's [Apple-Cillin](https://archive.org/details/xps-apple-cillin-ii-a2-ph/components/apple-cillin%20ii%20manual/), and the [6502 Memory Test](https://www.willegal.net/appleii/6502mem.htm) utility that's a bit more generic. (Boy, would it not have been fun to have to type in programs manually from magazines back in the day!)