ST-506 controller
From Vogons Wiki
The ST-506 interface (also known as MFM/RLL) was introduced by Seagate for their first hard disk, and later adopted by IBM for the XT and AT.
See also
- ST-506 at Wikipedia
The ST-506 interface (also known as MFM/RLL) was introduced by Seagate for their first hard disk, and later adopted by IBM for the XT and AT.