set-floppy command

The set-floppy command attaches the first floppy (in the list-device listing) drive to the current process for subsequent input or output activity. The drive indicator and density are indicated with the options provided.


 set-floppy {(density, drive)}


density e Selects 2.88 MB floppy disk.
h High density (1.2 MB for 5.25-inch, 1.44 MB for 3.5-inch) floppy disk.
s Standard density (360 KB for 5.25-inch, 720 KB for 3.5-inch) floppy disk.
drive a Selects 5.25-inch floppy disk.
b Selects 3.5-inch floppy disk.
h Selects 1.2 MB if 5.25-inch or 1.44 MB if 3.5-inch floppy disk.
s Selects 360 KB if 5.25-inch floppy disk.
l Selects 720 KB if 3.5-inch floppy disk.


This is used after the t-att command to designate the density to read/write hard disks and which floppy disk drive to use when more than one drive is present.

  • Drive choices are typically A or B.
  • Default values are drive A, high density.
  • Default block size is 500.

This command does not allow selection among two devices of the same type.

If two or more devices of the same type are present, the first one in the configuration file is selected. This command may fail on an unformatted floppy disk.

Do not forget to rewind with the t-rew command prior to attempting any read or write operation.


Attaches the floppy disk drive A at high density.

 set-floppy (ah