Sony HB-G900AP
This page was last modified 10:28, 14 April 2019 by Rderooy. Based on work by Gdx and Mars2000you and others.



The HB-G900AP is the HB-F900 localised for the European market with more RAM. This computer supports superimpose with genlock via a special video interface connector on the back.

The HB-G900AP was a special computer aimed at the professional market. It's was sold in the Netherlands, Germany, France and Spain. The keyboard is separate and the layout is QWERTY, AZERTY or QWERTZ depending on the destination country. Documentation is multilingual. This model is only available in white color.

It included a mouse and a special version of the software Multi-Teloper (Q-Manager & Graphics Editor) on floppy disk.

Brand Sony
Type HB-G900AP
Year 1987
Region France, Germany, the Netherlands and Spain
Original price
RAM 512kB in slot 3-0
VRAM 128kB
Media MSX cartridges, 2DD floppy disks
Video Yamaha V9938
Audio PSG (YM2149 integrated in MSX-Engine S1985)
Chipset Yamaha S1985
Extras One or two 720kB 3.5" floppy disk drives, superimpose capability, RS-232C interface, reset button, software


Sony HB-G900AP
Sony HB-G900AP front


The HB-G900AP is a MSX2 with a Z80A from Sharp (LH0080A) or NEC (uPD780C) and an MSX-Engine S1985 from Yamaha.

The architecture is similar to the HB-F700. The RAM is located in secondary slot 3-0. It can be upgraded to 1024kB by adding the same RAM type to the reserved empty locations.

The optional AV creator HBI-900 interface seems to be replacing the Videotizer (HBI-G900), a simplified interface to digitize images and have superimpose abilities for the European market.

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 Cartridge
Slot 1
Slot 2
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM Disk ROM RS-232 Firmware
Page 0000h~3FFFh Sub-ROM