View source for SAM Coupé disk

{{FormatInfo
|formattype=physical
|subcat=Floppy disk
|released=1989
}}

The '''[[SAM Coupé disk]]''' (3 1/2", double sided, double density) was the floppy disk format used in the SAM Coupé computer, a late-1980s British home computer that imitated the Sinclair ZX Spectrum. The disk drives on that computer were also able (with appropriate software) to read [[PC-DOS 720K format]] disks.

Disks for the SAM Coupé had 2 sides, 80 tracks per side, and 10 sectors per track. Each sector stored 512 bytes, making a total capacity of 800K, of which 20K was taken up by directory information.

A [[+D filesystem]] was used, based on the one used by the Sinclair, but with some additional file types. The disk operating system was called SAM Coupé ProDOS (not related to Apple's [[ProDOS]]) and also labeled [[CP/M]] 2.2, so it was apparently based on CP/M.

Disk data could be damaged if the disk was left in the drive when powering up or down the system.

3 1/2" disks are actually 90 mm wide, but are almost universally referred to as "3 1/2 inch" disks even in countries that use the metric system.

== Links ==
* [[Wikipedia:SAM Coupé|Wikipedia article]]
* [http://www.samcoupe-pro-dos.co.uk/ SAM Coupé Pro-DOS CP/M 2.2 manual and other info/downloads]
* [http://jsmess.textfiles.com/messloader.html?module=samcoupe JSMESS emulation of SAM Coupé]