Floppy disk controller

From AMC-OS Developers
Revision as of 13:53, 30 August 2012 by Kindman (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search


The floppy disk controller is used to control up to 4 floppy disk drives.

In the PC computer, it was originally based on a Nec uPD765 chip. On the PC/AT, a register was added to inform the OS that the media changed, and several other registers were added in the PS/2 and Model30 computers. Enhanced controllers were then implemented, with new functions and support of perpendicular mode, generally based on the Intel 82077AA chip.

Original specifications