Sony HBK-30
This page was last modified 21:06, 27 January 2020 by Rderooy.


The HBK-30 is a 3.5" floppy disk drive interface adapter with fixed data cable, released by Sony, and meant to be used in combination with the HBD-30W disk drive.

The interface adapter has a switch allowing to choose between single-sided 360kB and double-sided 720kB. The Sony HBD-30W service manual gives a strange and unlikely explanation that the switch is to used when switching between single-sided and double-sided diskettes. The Sony HBK-30/HBD-30W service manual gives another, more likely, explanation that the switch should be set to Single when used with the Sony HBD-30 single-sided drive, and set to Double for the Sony HBD-30W double-sided drive. However there is no record of a single-sided HBD-30 drive having been released.

The interface includes a ROM with version 1 of the Disk BASIC commands.

Brand Sony
Type HBK-30
Year 1986
Region JP, Europe
Official price ¥20,000
Package content HBK-30 drive
Operating instructions
Emulation ROM dumped, and emulated in combination with the HBD-30W


Sony HBK-30 interface