Sony HB-F900
This page was last modified 21:40, 9 June 2023 by Mars2000you. Based on work by Gdx and Grauw and others.



The Sony HB-F900 is a computer aimed at the Japanese professional market. It can do superimposing with genlock signal (GENerator LOCK) via a specific video I/F connector on the back.

Combined with the HBI-F900 AV Creator (video/soundmixer and digitizer), it's a very professionnal machine.

This model is available in black (B) or in white (W) color. The separate keyboard (KBD-13 or KBD13(B)) comes either from the HB-F500 or the HB-T600 rather than a dedicated design.

It was sold with the MOS-1 mouse and the "Wordship" (Japanese Word Processor) on floppy disk.

A set of advanced tools was also released for the HB-F900 / HBI-F900 system: see HBS-H022D.

Brand Sony
Model HB-F900
Year 1986
Region Japan
Launch price ¥148,000
RAM 256kB in slot 3-1
VRAM 128kB
Media MSX cartridges, 2DD floppy disks
Video Yamaha V9938
Audio PSG (YM2149 integrated in MSX-Engine S1985)
Chipset Yamaha S1985
Keyboard layout QWERTY/JP50on + numeric keypad
Extras 2x 720kB 3,5" floppy disk drive, internal speaker, reset button, Kanji-ROM JIS level 1, superimposition capacity + SonyVideo1 BASIC, sold with MOS-1 mouse + two floppy disks with MSX-DOS 1 and "Wordship" Japanese Word Processor (program + data)
Emulation ROMs dumped and emulated except for the HBI-F900 functionality


Sony HB-F900(B) black
Sony HB-F900(B) unit black
Sony HB-F900 mainboard
Sony HB-F900(B) with HBI-F900 (black)
Sony HB-F900(W) white
Sony HB-F900(W) white rear
Sony HB-F900 manuals and RGB21 cable


The HB-F900 is a MSX2 with a Z80A from Sharp (LH0080A) or NEC (uPD780C) and an MSX-Engine S1985 from Yamaha.

The optional AV creator HBI-F900 interface is needed to digitize images, create video effects and even edit video. The AV creator is only available in black.

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 Firmware
Page 0000h~3FFFh Sub-ROM
  • The firmware is a 8kB "Video Utility" ROM (4000h-5FFFh) containing SonyVideo1 BASIC


External Links