---
title: IBM PS/1
categories:
- Computers
params:
  name: PS/1
  image: /media/museum/photos/ibm_ps1_1s.jpg
  company: /companies/ibm
  company_name: IBM
  tabs:
  - photos
  - links
  - docs
  - videos
  forum_thread: 1239
  photos:
  - title: IBM PS/1
    subtitle: ''
    text: Thanks to IBM for this picture
    image: /media/museum/photos/ibm_ps1_1.jpg
  - title: IBM PS/1 EXPLAINED
    subtitle: ''
    text: Thanks to Kia Purity for this picture
    image: /media/museum/photos/ibm_ps1_explained.jpg
  - title: FRONT
    subtitle: ''
    text: Thanks to Kia Purity for this picture
    image: /media/museum/photos/ibm_ps1_front-scheme_1.jpg
  - title: BACK
    subtitle: ''
    text: Thanks to Kia Purity for this picture
    image: /media/museum/photos/ibm_ps1_back_1.jpg
  - title: EXPANDED WITH A 5.25'' DISK DRIVE
    subtitle: ''
    text: Thanks to Kia Purity for this picture
    image: /media/museum/photos/ibm_ps1_expanded.jpg
  - title: BOOT SCREEN / MENU
    subtitle: ''
    text: Thanks to Kia Purity for this picture
    image: /media/museum/photos/ibm_ps1_boot-screen_1.jpg
  links:
  - title: 'PS/1: a machine for the masses'
    url: http://findarticles.com/p/articles/mi_m1563/is_n3_v9/ai_10392355
    text: article from Home Office Computing, March, 1991 by Patrick Henry
  - title: Silicium.org - PS/1 page
    url: http://www.silicium.org/ibm/ibm/ibmps1.htm
    text: Interesting comment
  - title: Wikipedia
    url: http://en.wikipedia.org/wiki/IBM_PS/1
    text: PS/1 article
  docs:
  - title: HARDWARE MAINTENANCE SERVICE FOR IBM PS/1
    url: null
    cover: /media/museum/docs/couvs/ibm_ps1_hardware-maintenance-manual2.jpg
    text: |-
      **HARDWARE MAINTENANCE SERVICE FOR IBM PS/1**\
      written by IBM

       compiled/archived by Rãzvan Corneliu C.R. VILT\
       type of document : Online reader

      **... READ THE ONLINE VERSION BY CLICKING BELOW :**
  videos:
  - title: PS/1 TV commercial
    url: https://www.youtube.com/watch?v=QNQqTA9Pmb8
    text: 'Length: 2 min 31 s'
  related:
  - /museum/amstrad-pc-1512
  - /museum/amstrad-pc-1640
  - /museum/amstrad-ppc-512-640
  - /museum/ibm-pc-at
  - /museum/ibm-pc-model-5150
  - /museum/ibm-pc-portable-model-5155
  - /museum/ibm-pc-xt-286
  - /museum/ibm-pc-xt-model-5160
  - /museum/micronique-hector-xt
  oc_id: 1274
  source:
    url: https://web.archive.org/web/20230531222407/http://www.old-computers.com/museum/computer.asp?c=1274
    date: '2023-05-31'
---

Please help us improve this description by sending us more info!

The PS/1 was IBM's return to the home computing market. It was the successor to the IBM PCjr, although it was compatible with IBM's bussines systems. The PS/1 was a propriatary system at first, but standard components were used later on. The later models included "Rapid Resume" a standby feature.

The system uses a LPX form factor (layout). Everything was built into the motherboard and had a four expansion slots of 16bit ISA but on a riser card. The memory was 72pin simms.

For the 486SX model for example, the CPU is integrated onto the motherboard but there is a socket3 that is empty. Apparently it is possible to put in another 486 CPU and the system disables the built-in CPU, which is not possible with the 386 model.

The software was Windows 3.1 and MS-DOS 6.2 on these systems. There is a bootloader from IBM that let you select ether to boot into DOS or Windows.

**Contributors :** Nick, Leland

<table> <tr> <td></td> <td>We need more info about this console ! 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>