Sony HB-F1XDmk2
This page was last modified 12:07, 19 March 2022 by Mars2000you. Based on work by Gdx and Rderooy.



Sony HB-F1XDmk2 is a cost reduced version of the HB-F1XD. The features and functions are identical, but the casing is a slightly darker black and the red FDD cover has changed to grey. Internally, the FDD has changed from a direct-drive model to a belt driven model. This makes the mk2 less reliable as the rubber belt will break or turn to goo over time and will have to be replaced. The metal shielding has been reduced in size and the system board is a newer revision, although it still contains the same basic components.

The keyboard is quite complete with special keys. There is a hardware PAUSE-button which hangs the computer when pressed. The SPEED-CONTROLLER slider (slow-motion) and the REN-SHA-TURBO slider (auto-fire for both joysticks and spacebar) are nice features for playing games.

Sony HB-F1XDmk2 was available in black and grey on the floppy disk drive. It was aimed at the Japanese market.

At least initially the F1 Tool disk was included with the system.

Brand Sony
Model HB-F1XDmk2
Year 1988-09-21
Region Japan
Launch price ¥49,800
RAM 64kB in slot 3-3
VRAM 128kB
Media MSX cartridge, 2DD floppy disk (3.5")
Video Yamaha V9938
Audio PSG
Chipset Yamaha S1985
Keyboard layout QWERTY/JIS + numeric keypad
Extras speed controller, Ren-Sha Turbo (autofire), hardware pause key, floppy disk drive
Emulation ROMs dumped and emulated


Sony HB-F1XDmk2
Sony HB-F1XDmk2 - Right side
Sony HB-F1XDmk2 - Back


The Sony HB-F1XDmk2 is a MSX2 with 2 cartridge slots (one at the top, one at the back). Floppy Disk Controller chip is the 2793.

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
Page 4000h~7FFFh Main-ROM Disk ROM
Page 0000h~3FFFh Sub-ROM


  • RGB output
  • RF output
  • Analog sound & Composite video
  • Tape recorder connector
  • Centronics compatible Parallel port for a printer
  • 2 general connectors (joysticks, mouse, paddle controllers, ...)
  • 2 cartridge slots

Repair and Modifications

  • The systemboard has a daughterboard called "HIC-1" which contains three SMD electrolytic capacitors which will leak over time and badly damage the board around it. Please see this thread about replacing them.