* Useability enhancement for PCs without a keypad or physical joystick/gamepad ;)
* There will be contention in programs that utilize both the joystick and arrow keys for
different things, yet I don't know of any examples of this...
* Use defines instead of magic numbers in a bunch of places
* Remove deprecated ii_keymaps and only use iie_keymaps
* Allow keypad corners for emulated joystick
* Merges input handling into one routine called thru video_sync at refresh rate
* Adds keypad joystick calibration routine
* Simplify joystick calibration routines to use same codepath as main emulator joystick handling
* Add proper timers according to spec mentioned in _Understanding the Apple IIe_
* This will allow us to refactor/eliminate all the hackish joystick adjustment routines
* Deprecate "lazy" color modes
* Allow setting speaker sound volume
* Make Joystick code more generic (future support of touch input)
* Deprecate setting emulator mode (//e is ascendant)
* Condensed reboot code path into reset codepath
* Reset sequence now checks for openapple or closedapple key and routes accordingly
* Pause/Break key is now strictly emulation pause key
* F4 is now unused
* End key is now mapped as //e reset key (easier to hit, and less likely window manager is using it)
* PrintScreen/SysReq key is now unused
* fixes a bug where op_BRK doesn't work when Mockingboard installed
* this is still hackish and hardcoded ... ultimately we need an interface to add/remove virtual peripherals
* Currently the SSI263 thread is disabled (not even initialized in MB_DSInit()
* Do we need this stuff? Methinks we do, yet we don't have a testcase of
needing it (MB C in 4 & 5 --or-- Phasor in 4 works fine with U5) Wtf?
