This page was last modified 00:13, 13 April 2019 by Rderooy. Based on work by Mars2000you and Gdx and others.



The HB-F1XDJ is an MSX2+ computer released by Sony in 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 two floppy disks 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.

Brand Sony
Year 1988
Region Japan
Original 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
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


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


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.