---
title: Hitachi S1
categories:
- Computers
types:
- Professional Computer
origins:
- Japan
cpus:
- Motorola 68B09E
params:
  name: S1
  image: /media/museum/photos/hitachi_s1_1.jpg
  company: /companies/hitachi
  company_name: Hitachi
  specs:
  - label: NAME
    value: S1
  - label: MANUFACTURER
    value: Hitachi
  - label: TYPE
    value: Professional Computer
  - label: ORIGIN
    value: Japan
  - label: YEAR
    value: Unknown
  - label: BUILT IN LANGUAGE
    value: Unknown
  - label: KEYBOARD
    value: Full-stroke keyboard with numeric keypad
  - label: CPU
    value: Motorola 68B09E
  - label: SPEED
    value: 1/2 MHz
  - label: RAM
    value: 106 KB (max 618 KB)
  - label: VRAM
    value: Unknown
  - label: ROM
    value: 24 KB (Level3 Basic) + 64 KB (S1 Basic)
  - label: TEXT MODES
    value: Unknown
  - label: GRAPHIC MODES
    value: 640 x 200 / 320 x 200
  - label: COLORS
    value: '256'
  - label: SOUND
    value: Unknown
  - label: I/O PORTS
    value: Tape, RS232C, Printer
  - label: BUILT IN MEDIA
    value: optional external 5.25
  - label: OS
    value: Built in Basic
  - label: POWER SUPPLY
    value: Built-in power supply unit
  - label: PRICE
    value: $1199 (Australia, 1985)
  tabs:
  - photos
  forum_thread: 345
  photos:
  - title: THE S1-45
    subtitle: ''
    text: The S1 was followed by the S1-45 (I have no information about it).
    image: /media/museum/photos/s145.jpg
  - title: AUSTRALIAN PRICE LIST (1985)
    subtitle: ''
    text: Thanks to David Wilson for this picture
    image: /media/museum/photos/hitachi_mbs1_price-list.jpg
  oc_id: 341
  source:
    url: https://web.archive.org/web/20221205112156/http://www.old-computers.com/museum/computer.asp?c=341
    date: '2022-12-05'
---

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!

<table> <tr> <td></td> <td>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.</td> <td></td> </tr> </table>