This page was last modified 13:58, 7 December 2021 by Mars2000you. Based on work by Gdx and Rderooy and others.



The HB-F1XDJ is an MSX2+ computer released by Sony in late 1988 and was originally sold for ¥69,800. This model was later replaced by the HB-F1XV with a few minor changes. As with all MSX2+ machines, the HB-F1XDJ was only sold in Japan.

The HB-F1XDJ was sold with a floppy disk containing graphic and game programming tools. The graphics editor is the same as the one from the HB-F900, but lacks some features. A Japanese word processor can be used, but it requires the corresponding disk from the HB-F1XV.

If the computer was purchased from 1989-02-21 to 1989-04-20 they would also have received the F1 Tool Disk II

Brand Sony
Model HB-F1XDJ
Year 1988-10-21
Region Japan
Launch price ¥69,800
RAM 64kB in slot 3-0
VRAM 128kB
Media MSX cartridges, 720kB 3.5" floppy disks
Video Yamaha V9958
Audio PSG (YM2149 integrated in MSX-Engine), MSX-MUSIC (YM2413)
Chipset Yamaha S1985
Keyboard layout QWERTY/JIS + numeric keypad
Extras MSX-MUSIC BASIC, 256kB Kanji-ROM JIS level 1 & 2, MSX-JE, speed controller, Ren-Sha Turbo (autofire), hardware pause key, 2DD floppy disk drive, programming tools on disk, Kanji BASIC
Emulation ROMs dumped and emulated


Sony HB-F1XDJ rear
Sony HB-F1XDJ right side
Sony HB-F1XDJ motherboard
Sony HB-F1XDJ motherboard bottom
Sony HB-F1XDJ box
Sony HB-F1XDJ accessories, software and manuals + F1 Tool Disk II


The HB-F1XDJ is an MSX2+ system with two cartridge slots (one at the top, one at the back). The CPU is a Z80A manufactured by Zilog (Z0840004SPC) and the MSX-Engine chipset is the Yamaha S1985. Floppy Disk Controller chip is the MB89311.

The HB-F1XDJ does not have accommodations on its motherboard for an internal RAM expansion, but it is possible to expand the system's memory by replacing the individual RAM chips with a small PCB (see the link below for details).

Slot Map

Slot Slot
0-0 0-1 0-2 0-3 Slot 1 Slot 2 3-0 3-1 3-2 3-3
Page C000h~FFFFh MSX-JE Cartridge
Slot 1
Slot 2
Page 8000h~BFFFh Kanji
Page 4000h~7FFFh Main-ROM Disk ROM MSX-Music
Page 0000h~3FFFh Sub-ROM


Repair and modification information

  • RAM upgrade (Portuguese)
  • As with many MSX2 and MSX2+ machines with a built-in floppy drive, the rubber drive belt has a tendency to deteriorate with age, preventing the system from accessing disks. A proper replacement drive belt has a diameter of 59 mm, is 186 mm in length, 2.8 mm wide and is 0.4 mm thick.
  • 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.
  • The systemboard has various ELNA capacitors which will leak over time and need to be replaced. See this thread for more information.
  • Video board diagram circuit (direct download link)
  • Keyboard repair kit for Sony HB-XD/XDJ/XV (Japanese)
  • To fix the slight crackling in FM sound, replace C99 by a wire and C20 by an unpolarized capacitor of same capacity. You can also add an 4.7k resistor between C20 and the sound input but it's not essential. (Source by Niga)