The Commodore 128 has the JiffyDOS ROMs installed. I have a switch and wires that can be soldered to the chipset to allow for easy disabling of JiffyDOS. It also has the upgraded VIC chip with more memory. The Ultimate II+ has the JiffyDOS ROMs flashed on it (and there are backups on the thumbdrive). The 1541 drive works (as shown in the images of CPM booting).
The Commodore 128 has the JiffyDOS ROMs installed. I have a switch and wires that can be soldered to the chipset to allow for easy disabling of JiffyDOS. It also has the upgraded VIC chip with more memory. The Ultimate II+ has the JiffyDOS ROMs flashed on it (and there are backups on the thumbdrive). The 1541 drive works (as shown in the images of CPM booting).