Click Here to visit our Sponsor
The History of Computing The Magazine Have Fun there ! Buy goodies to support us
  Mistake ? You have mr info ? Click here !Add Info     Search     Click here use the advanced search engine
Browse console museumBrowse pong museum


ZX81 T-shirts!

see details
ZX Spectrum T-shirts!

see details
Ready prompt T-shirts!

see details
Atari joystick T-shirts!

see details
Spiral program T-shirts!

see details
Arcade cherry T-shirts!

see details
Battle Zone T-shirts!

see details
Vectrex ship T-shirts!

see details
Moon Lander T-shirts!

see details
Competition Pro Joystick T-shirts!

see details
C64 maze generator T-shirts!

see details
Atari ST bombs T-shirts!

see details
Elite spaceship t-shirt T-shirts!

see details
Pak Pak Monster T-shirts!

see details
BASIC code T-shirts!

see details
Vector ship T-shirts!

see details
Pixel adventure T-shirts!

see details
Breakout T-shirts!

see details

H > HITACHI  > S1   


Nearly nothing is known about this obscure system. Help welcome !


Pat from Australia, remembers:
On a whim, I looked up the Hitachi S1. When I was much younger - probably in 1984 or 1985 - my dad worked as a Hitachi reseller in Australia. The S1 was not sold outside of Japan to my knowledge, but it did have English available as a language so that may not be for certain. What really caught my attention outside of the amazing computational capabilities and colours (having used Hitachi Peaches for quite a while) was that the S1 (or at least the one I was playing with) had a hard disk! If only I could remember the name of the games I was playing on this thing!

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.
Please consider donating your old computer / videogame system to or one of our partners from anywhere in the world (Europe, America, Asia, etc.).


I now have two hitachi MB-6890K computers, I would like to contact anyone who has any more for sale or parts (or an S1).
Any info about them and some software would be great as well!

Saturday 18th November 2017
Murray (Sydney, Australia)
The Hitachi MB-6890 Peach

Craig - it probably had my hard disk interface card in it. We didn''t sell many. I reverse engineered the os/9 level 2 card that was needed for os/9. It did the ram memory mapping as well as extra ram. I probably have my sketches somewhere. The S1 was a stunning piece of hardware in its day - it was full of custom ics as compared with the mb6890 which was pretty well all standard ics.

Thursday 26th May 2016
Rusty (Australia)

Just came accross this old thead. I too had a Hitachi peach and ended up with a S1 as well. They were sold in Australia. Was a great little beast of a box. I ended up purchasing OS9 from Hitachi Japan. The only issue is that out of the box it couldn''t read other 5.25" floppy disks from other OS9 systems. My brother who was a Flex/OS9 freak ended up re-writing some of the device drivers so I could read/write disks off his various systems. Was way ahead of it''s time imho. Ended up selling it for a pitance in the end :(


Friday 15th November 2013
CraigM (Australia)


TYPE  Professional Computer
YEAR  Unknown
KEYBOARD  Full-stroke keyboard with numeric keypad
CPU  Motorola 68B09E
SPEED  1/2 MHz
RAM  106 KB (max 618 KB)
VRAM  Unknown
ROM  24 KB (Level3 Basic) + 64 KB (S1 Basic)
GRAPHIC MODES  640 x 200 / 320 x 200 
SOUND  Unknown
I/O PORTS  Tape, RS232C, Printer
BUILT IN MEDIA  optional external 5.25
OS  Built in Basic
POWER SUPPLY  Built-in power supply unit
PRICE  $1199 (Australia, 1985)

Please buy a t-shirt to support us !
Ready prompt
ZX Spectrum
Arcade cherry
Spiral program
Atari joystick
Battle Zone
Vectrex ship
C64 maze generator
Moon Lander
Competition Pro Joystick
Atari ST bombs
Elite spaceship t-shirt
Commodore 64 prompt
Pak Pak Monster
Pixel Deer
BASIC code
Shooting gallery
3D Cubes
Pixel adventure
Vector ship

Related Ebay auctions in real time - click to buy yours

see more Hitachi  S1 Ebay auctions !

Click here to go to the top of the page   
Contact us | members | about | donate old-systems | FAQ
OLD-COMPUTERS.COM is hosted by - NYI (New York Internet) -