Sony HB-F900
This page was last modified 10:29, 22 April 2022 by Gdx. Based on work by Mars2000you and Grauw and others.



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

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.

Sold with the MOS-1 mouse and the "Wordship" (Japanese wordprocessor) on floppy disk.

The Sony HB-F900 was used in the Mir space station.

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, superimposition capacity, internal speaker, reset button, Kanji-ROM JIS level 1, software
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


External Links