HT6551
Super I/O Controller
Features
100% compatible to IBM PC AT/XT Fully IBM–BIOS compatible floppy disk
controller – 48mA floppy drive interface buffers – Support two floppy drives with capability
of supporting up to four drives with an external decoder – Support 360K/720K/1.2M/1.44M/2.88M formats – Support 250Kb/s, 300Kb/s, 500Kb/s, 1Mb/s data rate ...