Sony HB-F1
This page was last modified 12:04, 19 March 2022 by Manuel. Based on work by Mars2000you and Gdx and others.
Sony HB-F1.png




The Sony HB-F1 was available in all black or in black and red. It was aimed at the Japanese market. It was replaced at the end of 1987 with the Sony HB-F1II to better compete against the Panasonic FS-A1.

The computer comes with an external power adapter, it includes a pause button that allows users to pause the system at will and a speed slider which can be used to slow down the system.

Brand Sony
Model HB-F1
Year 1986
Region Japan
Launch price ¥32,800
RAM 64kB in slot 3-3
VRAM 128kB
Media MSX cartridges
Video Yamaha V9938
Audio PSG
Chipset Yamaha S1985
Keyboard layout QWERTY/JP50on
Extras firmware (Address book, Schedule and Memo), pause button, speed controller.
Emulation ROMs dumped and emulated


The firmware is launched automatically when you boot the machine. Bypassing this software on startup requires the user to press the DEL key during boot until a Beep sound.

From MSX-BASIC, you can go to the Personal Databank with CALL HITBIT or _HITBIT.


When keeping the Y and P keys pressed during boot, you will get a scrolling list of the development team followed by a digitized voice saying "It's a Sony!". A video of it is available here. The Y and P keys seem to refer to "Yellow Panther", which is also encoded as a message at the beginning of the ROM. The message (written backwards in the ROM) reads "A Yellow Panther Production, 1986".


Sony HB-F1 (back) with its box
Sony HB-F1 (black)
Sony HB-F1 (right side)
Sony HB-F1 (back) back
Sony HB-F1 underside (back)
Sony HB-F1 (black and red)
Sony HB-F1 (black)
Sony HB-F1 (black)
Sony HB-F1 (black and red)
FS-A1 & HB-F1 adapter


Main menu
Address Book option
Schedule menu option
Notes option
F2 - Calculator
F3 - Clock
F4 - Calendar
Copy menu option
Development team


The Sony HB-F1 is a MSX2 with 2 cartridge slots (one at the top, one at the back).

The AC-HB3 power adapter specifications are the same as the Panasonic FS-AA51 adapter for the Panasonic FS-A1 and FS-A1mkII.

Slot Map

Slot 0 Slot 1 Slot 2 Slot 3-0 Slot 3-1 Slot 3-2 Slot 3-3
Page C000h~FFFFh Cartridge
Slot 1
Slot 2
Page 8000h~BFFFh Firmware 2 Firmware 3
Page 4000h~7FFFh Main-ROM Firmware 1
Page 0000h~3FFFh Sub-ROM