Atari Floppy Drive

The FloppyDrive included in Atari computers is nearly the same for all Atari 16/32 bits computers, except the High Density capability on later models (TT and Falcon).

There is 3 ways to access data of the floppy: GEMDOS functions (which shloud always be prefered), BIOS/XBIOS function (for specific low layer access), and FDC hardware registers access (in very specific situations!).

Regular Floppy Access with GEMDOS functions

See the file system functions in GemdosFunctionReference.

Lower Layer Floppy Access with BIOS/XBIOS functions

XBIOS functions:

• Floprate()?
• Floprd()?
• Flopver()?
• Flopwr()?
• Protobt()?

BIOS functions:

• Drvmap()
• Getbpb()
• Mediach()
• Rwabs()

Most Basic Floppy Access through FDC hardware registers

See the FDC description.

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