Category:Sony HB-75
This page was last modified 16:25, 15 October 2017 by Grauw. Based on work by Rderooy and Gdx and others.



The HB-75 is the big brother of the HB-55 as it comes with more RAM and a better keyboard. The following models exist:

  • HB-75: model with QWERTY Japanese keyboard and ANSI layout for kanas characters, available in 2 colors (black and white)
  • HB-75AS: model for Australia with QWERTY international keyboard layout including a £ key, available only in black
  • HB-75B: model for Great Britain with QWERTY international keyboard layout including a £ key, available only in black
  • HB-75D: model for Germany with QWERTZ keyboard layout, available only in black
  • HB-75F: model for France with AZERTY keyboard layout, available only in black
  • HB-75P: model for other European countries with QWERTY international keyboard layout including a £ key, available only in black

The machine comes with a built-in Personal Databank with saving on cassette tape or the HBI-55 data cartridge.

The Japanese model has only one cartridge slot, but an expansion bus can be used as second cartridge slot. On the international versions, the expansion bus slot is replaced by a second cartridge slot.

The firmware is launched automatically when you boot the machine.

Brand Sony
Type HB-75 / HB-75AS / HB-75B / HB-75D / HB-75F / HB-75P
Year 1984
RAM 64kB in slot 2
Media MSX cartridges
Video Texas Instruments TMS9918ANL (HB-75) or TMS9929A (other models)
Audio PSG (AY-3-8910A or YM2149F)
Chipset none (separate IC's)
Extras Personal Databank, reset button


Check also the pages about the different models!

Sony HB-75 (white)
Sony HB-75F
Sony HB-75 (black)
Sony HB-75P
Sony HB-75D
Sony HB-75 all models right side
Sony HB-75 (white) back
Sony HB-75AS/B/D/P back
Sony HB-75P inside
Sony HB-75F back


The HB-75 is a MSX1 with a Z80A from NEC (D780C-1). Its RAM is in slot 2.


  • RF output (on all models except HB-75F)
  • Analog sound output (mono) and composite output (only HB-75)
  • Monitor connector with sound and composite video outputs (6-pin DIN) on HB-75AS, HB-75B, HB-75D and HB-75P
  • RGB output (SCART-PERITEL) on HB-75AS, HB-75B, HB-75D, HB-75F and HB-75P
  • Tape recorder connector
  • Centronics compatible Parallel port for a printer
  • 2 general connectors (joysticks, mouse, paddle controllers, ...)
  • 1 cartridge slot (HB-75) or 2 cartridge slots (other models)
  • 1 expansion bus slot (only HB-75)


As it is conceived, this computer is only partially compatible with the addition of a disk drive. Such addition has as effect that the firmware menu is skipped when no any HBI-55 data cartridge is present. If you insert this cartridge in a slot, the firmware menu is not skipped, but the disk drive is not enabled. No any modification is possible to fix that issue.


Pages in category "Sony HB-75"

The following 6 pages are in this category, out of 6 total.