Sony HB-G900D
This page was last modified 16:09, 20 January 2023 by Mars2000you. Based on work by Rderooy and Gdx and others.



The HB-G900D is the adaptation simplified of the HB-F900 for the German market. This computer supports superimposing with genlock via a special video I/F connector on the back.

This model was a special computer aimed at the professional market. The keyboard is separate of unit. This model is only available in white color. The keyboard reference is KBD-12D.

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

The HB-G900D was later replaced by a more advanced model such as the HB-G900AP with a QWERTZ keyboard.

Brand Sony
Model HB-G900D
Year 1986
Region Germany
Launch price
RAM 64kB in slot 3
VRAM 128kB
Media MSX cartridges, 2DD floppy disks
Video Yamaha V9938
Audio PSG (AY-3-8910)
Chipset none (separate IC's)
Keyboard layout QWERTZ + numeric keypad
Extras One or two 720kB 3.5" floppy disk drives, superimposition capacity, reset button, software, SonyLDP BASIC
Emulation ROM dump needed. See this thread for details


Sony HB-G900D front
Sony HB-G900D keyboard
Sony HB-G900D box
Sony HB-G900D rear


The HB-G900D is a MSX2 with a Z80A from Sharp (LH0080A) and without MSX-Engine. The floppy disk controller chip is the CXD-1032Q (Sony).

The architecture is standard components. The RAM is 64 kb in primary slot 3.(See service manual Part1 and See service manual Part2)

The optional AV creator HBI-900 interface has been replaced by the Videotizer (HBI-G900), a simplified interface to digitize images and do superimposing for the European market.