Hitachi MB-H50
This page was last modified 17:02, 14 February 2023 by Mars2000you. Based on work by Gdx and Rderooy.



The Hitachi MB-H50 is a MSX computer with separate keyboard. It includes a system of LEDs to display the noise/music level, also when you are using a data recorder in LOAD or SAVE mode. This model was aimed at the Japanese market.

Three variations exist: MB-H50, MB-H50N and MB-H50S. Only the MB-H50 includes a MPN-8004H joypad, which is lacking from the other versions. The computers themselves are identical, the variation is indicated only on the box.

You can also notice that the MB-H50S is packaged in a simple box without extra info. This version was intended for the Research Institute of the Sanno Institute of Management, School Corporation.

Brand Hitachi
Model MB-H50 / MB-H50N / MB-H50S
Year 1986-10-21
Region Japan
Launch price ¥24,800
RAM 64kB (in slot 3-2)
Media MSX cartridges
Video Toshiba T6950A
Audio PSG (YM2149 integrated in MSX-Engine S3527)
Chipset Yamaha S3527
Keyboard layout QWERTY/JIS
Extras Sound Illumination Display, separate keyboard, 1 joypad MPN-8004H (MB-H50 only)
Emulation ROM dumped and emulated, except the extra LEDs


Hitachi MB-H50
Hitachi MB-H50 front
Hitachi MB-H50 front connectors
Hitachi MB-H50 left side
Hitachi MB-H50 back
Hitachi MB-H50 right side
Hitachi MB-H50 keyboard
Hitachi MB-H50 underside
Hitachi MB-H50 manual
Hitachi MB-H50 PCB
Hitachi MB-H50 box
Hitachi MB-H50N box
Hitachi MB-H50 label
Hitachi MB-H50N set
+ Panasonic FS-JS220 joypad
Hitachi MB-H50S box
Hitachi MB-H50S packaging


The MB-H50 is a MSX1 with a Z80A from Sharp (LH0080A) and an MSX-Engine S3527 from Yamaha.

The used VDP is the Toshiba T6950A, which does not support some undocumented features of the Texas Instruments TMS9918, TMS9928 and TMS9929 VDP's.

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
Page 0000h~3FFFh