• adds emulation of a 4mb Macintosh Plus, with its SCSI interface and corresponding support for hard disk images;
• adds optional fast-boot support for the Macintoshes, in which the emulator forces their boot-up memory test to be skipped;
• I've switched to a different model of Macintosh RAM timing: I now believe that for the models I emulate the proper behaviour is alternating four-cycle access and non-access windows while pixels are being output, and offering full bandwidth RAM access the rest of the time; and
• on a Mac host, ensures better routing of the command key into the emulator — it now won't trigger normal app-level host shortcuts while the mouse is captured. So e.g. command+q will be signalled to the emulated Macintosh, causing the application it is running to exit, rather than causing the emulator to exit.