I’ve added a new feature to the Macintosh/Lisa firmware for the Floppy Emu disk emulator: a menu for selecting disk images while running in Mac hard disk emulation mode. This is the mode that enables Floppy Emu to function as an HD20-type hard disk with compatible Macintosh models, with disk sizes up to 2 GB. Previously the hard disk image was always taken from a file named “HD20.dsk” on your SD card. If you had a few different hard disk image files, and wanted to select the right one for a given situation, you had to put the SD card into your Windows/OSX computer and rename the desired file to HD20.dsk. While this wasn’t a common need, it was not especially user-friendly.
Get the new firmware here: hd20-0.7F-F14.5
With the new firmware, the first time you run it you’ll see a hard disk image selection menu. The name of the chosen disk image file is saved in EEPROM memory, and will be used for all future sessions. If you later want to choose a different disk image file, the NEXT button will return you to the selection menu.
After choosing a new disk image for hard disk emulation mode, the Mac needs to be turned off and on (Floppy Emu will prompt you to do this), or you need to press the Mac’s hardware reset switch. That’s because the Mac doesn’t expect HD20-type drives to be removable media, and doesn’t recognize when the disk has changed. Without a reboot, it will blindly continue as if the original disk were still present, leading to unpleasant results.
I welcome your feedback on this change. Let me know if you run into any trouble.