Re: Floppy disk emulator for Lisa

One last update (I hope) on Lisa floppy drive emulation: I've released a new universal firmware that supports Mac and Lisa, HD20 and floppy, raw disk images and Disk Copy 4.2 images. It also brings the benefits of writable DC42 disk images to the Mac. Press the SELECT button while the Emu is displaying version info on the LCD, you’ll enter a config menu where you can choose to operate as a hard disk, Mac floppy drive, or Lisa floppy drive. More info on the new firmware is here: http://www.bigmessowires.com/2015/03/06/floppy-emu-universal-firmware-update/

The new firmware also uses a different strategy for updating Disk Copy 4.2 checksums. I still don’t have a good solution for keeping the checksums constantly updated when the disk image is modified, but instead of leaving the old (wrong) checksums in place, this new firmware sets the checksums to zero upon the first write to a DC42 image. Hopefully this will make it clearer for some future archivist who may encounter the modified image file, and he’ll understand the checksum was intentionally zeroed, rather than the image file being corrupted.

Steve

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