1) The Orbit microcode occasionally expects to be able to do a double-word read in cycles 6 and 7 instead of the usual 5 and 6.
2) The double-word logic incorrectly handles several species of overlapped read/writes, which Spruce's layout microcode uses.
As a result, Spruce now works, as do the Smalltalk-80 images.
Several tweaks to microcode disassembly (still rough).
Completed Orbit / Dover ROS / Dover Print Engine emulation. Still some rough edges; it works and can create PDF output.
Tweaked Disk Controller's Restore operation, it is now more accurate though wasn't causing any noticable issues.
- Orbit controller: implemented and passes ROS-less diagnostics
- ROS: In progress, not functional
- DAC: For Ted Kaehler's Smalltalk Music system (FM and Sampling). Works, generates audio and can capture to WAV file.
- Organ keybard: Stub, enough implemented to make the music system happy (so it will play back music and not crash.)
Some minor cleanup.
New dependency on NAudio package for DAC playback. Installer updated to include NAudio lib.
