Better support the IIe's aux slot when it's empty or has the 80-col(1KiB) card.
- any h/w using this alternate CPU emulation, (ie. aux=empty or 80-col(1KiB)), then the 'mem' cache is completely bypassed.
Debugger: change all the direct 'mem' accesses to go via ReadByteFromMemory().
TestCPU6502: test the alt CPU emulation code too.
This replaces the LPDIRECTSOUNDBUFFER pointer with a pure virtual class and an implementation that wraps the LPDIRECTSOUNDBUFFER, allowing other sound implementations without having to simulate the exact alignment of a DIRECTSOUNDBUFFER object.
Additionally, moves the DSInit and DSUninit calls out of the SoundCore.cpp file (into a new DXSoundBuffer.cpp (for Windows)), allowing them to be appropriately reimplemented in a non-DirectSound environment.
Added new SmartPort Harddisk Controller (HDC) firmware for Enhanced //e. (@burniouf)
. remove the old DOSMaster entrypoints.
. firmware ID byte (at $FE) defaults to 4 ProDOS block devices (was 2 with older v2 f/w).
Enhanced //e defaults to using SP f/w, and older Apple II's still use the older v2 f/w.
Support up to 8 units per HDC (currently limited to 4GiB capacity for each unit).
Save-state: save HDC firmware in state file.
New slot-specific switches to configure each HDC's firmware: -s<N> -hdc-[sp|bm2|bm4].
New switch to select old non-SP firmware for all HDCs: -hdc-firmware-v2.
