The Opus Discovery is a floppy disk interface for the ZX Spectrum.

Technical Specifications

Opus uses the WD1770 FDC chip.

Media

3.5" hard cased disks as used with Amstrad and Tatung computers.

Number of drives per system: 2

Storage capacity: 180 Kbytes per side

Number of tracks: 40

Number of sectors per track: 18

Sector size: 256 bytes

Formatting: approx. 17.5 sec

Cataloguing: approx. 4sec

Loading a screen: approx. 4sec