TDS3000 and 3000B operate the floppy and parallel port through a "super IO" chip as used on computer motherboards of the era. At TDS3000C they removed the super IO and put in a USB controller.
TDS3000 and 3000B operate the floppy and parallel port through a "super IO" chip as used on computer motherboards of the era. At TDS3000C they removed the super IO and put in a USB controller.