Tandy 1400FD Floppy Drives

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The Tandy 1400 FD had two internal 720K floppy disk drives (the left drive being the primary drive, usually Drive A), and supported connection of an external drive via a dedicated floppy disk connector on the rear of the computer.


External Drives

Two external 5¼-inch floppy drives were available from Radio Shack:

  • Radio Shack Catlogue # 900-2220 - a Weltec Drive, which connected via the floppy drive connector on the back of the computer (see Tandy 1400FD Pinouts)
  • Radio Shack Catlogue # 250-1087 - 1.2 MEG external floppy disk drive, which did not use the floppy drive connector

When using a Weltec drive, drive letter designations were changed by connecting the external drive depending on the position of the switch on the side of the computer near the power switch:

Drive Selector Switch on INT:

  • Left Drive: Drive A
  • Right Drive: Drive B
  • External Drive: Drive C

Drive Selector Switch on EXT:

  • Left Drive: Drive C
  • Right Drive: Drive B
  • External Drive: Drive A

When using the 250-1087 1.2 MEG external drive, the selector switch was not used but a software driver included the drive was needed.


See Also