---
title: Texas Instruments LCM-1001
categories:
- Computers
types:
- Home Computer
origins:
- U.S.A.
years:
- '1976'
cpus:
- 4-bit SPB0400
params:
  name: LCM-1001
  image: /media/museum/photos/texas_lcm1001_system_s1.jpg
  company: /companies/texas-instruments
  company_name: Texas Instruments
  specs:
  - label: NAME
    value: LCM-1001
  - label: MANUFACTURER
    value: Texas Instruments
  - label: TYPE
    value: Home Computer
  - label: ORIGIN
    value: U.S.A.
  - label: YEAR
    value: '1976'
  - label: BUILT IN LANGUAGE
    value: None
  - label: KEYBOARD
    value: Data / address / control switches
  - label: CPU
    value: 4-bit SPB0400
  - label: SPEED
    value: Unknown
  - label: RAM
    value: Unknown
  - label: I/O PORTS
    value: 40-pin socket
  - label: BUILT IN MEDIA
    value: None
  - label: POWER SUPPLY
    value: external AC adaptor or rechargeable battery
  - label: PERIPHERALS
    value: Expansion modules (?)
  - label: PRICE
    value: about $280
  tabs:
  - photos
  photos:
  - title: CPU CARD
    subtitle: ''
    text: The empty socket was used to add expansion modules.
    image: /media/museum/photos/texas_lcm1001_cpucard_s1.jpg
  - title: THE BOX
    subtitle: ''
    text: ''
    image: /media/museum/photos/texas_lcm1001_box_s1.jpg
  - title: INSTRUCTION MANUAL
    subtitle: ''
    text: ''
    image: /media/museum/photos/texas_lcm1001_system_s2.jpg
  - title: SYSTEM DIAGRAM
    subtitle: ''
    text: Probably the simpler computer architecture ever seen!
    image: /media/museum/photos/texas_lcm1001_diagram_s1.jpg
  - title: TI PLATE
    subtitle: ''
    text: ''
    image: /media/museum/photos/texas_lcm1001_plate_s1.jpg
  comments:
  - author: Denny Mingus
    date: Thursday 28th May 2015
    text: |-
      Attempting to use the add info button on your site, throws a 500 error on POST.\
      •Error Type:\
      (0x80040211)\
      /site/header/action_add_info.asp, line 82
  - author: Denny Mingus (USA)
    date: Thursday 28th May 2015
    text: I''d like to share some photos of the TI LCM modules. I have the 1001, 1002, 1003 and 1004. Please contact me.
  - author: A_V_P
    date: Sunday 23rd February 2014
    text: |-
      "Adam Roman (USA, Chicago area)

      I have the original 57-page Data Manual from October 1976 for the SBP0400A and SBP0401A 4-Bit-Slice I2L Processor Elements. This is contained in TI''''s December 1977 Bipolar Microcomputer Components Databook. The book also contains the full revised Data Manual for the SN74S481 / SN54S481 / SN74LS481 4-Bit-Slice Schottky Processor Elements. I can scan and post these if anyone needs them."

      Very interested datasheet on SBP0400!!! Please, if it is not difficult, to send this datasheet to my email: kolba1958@gmail.com.
  - author: A_V_P (Russia)
    date: Sunday 23rd February 2014
    text: I am the author cited on this website books on all Soviet list IC''s "All domestic circuit." I have a few questions for the forum participants.
  - author: Adam Roman (USA, Chicago area)
    date: Tuesday 16th April 2013
    text: I have the original 57-page Data Manual from October 1976 for the SBP0400A and SBP0401A 4-Bit-Slice I2L Processor Elements. This is contained in TI''s December 1977 Bipolar Microcomputer Components Databook. The book also contains the full revised Data Manual for the SN74S481 / SN54S481 / SN74LS481 4-Bit-Slice Schottky Processor Elements. I can scan and post these if anyone needs them.
  - author: jf (france)
    date: Thursday 6th March 2008
    text: |-
      I have the complet LCM-1001, box and manuel.\
      This object is used no new.\
      What is the price ?\
      Thanks
  - author: Ivan Assaritti (Indaiatuba - Brazil)
    date: Wednesday 22nd June 2005
    text: I'm looking for to purchase the "operation manual" and/or circuit diagram from Texas LCM-1001. I tried to find the SPB0400 4bit uP datasheet but I didn't. I intend to make a LCM-1001 emulator on PC. Thank You!
  oc_id: 999
  source:
    url: https://web.archive.org/web/20230227233124/http://www.old-computers.com/museum/computer.asp?c=999
    date: '2023-02-27'
---

Almost no information about this 'computer' which was probably the first microprocessor trainer Texas Instruments produced.

The system held two chips, a quad-Nand 74279 logic chip and a 4-bit SPB0400 processor which was the first processor made using the VLSI process technology.

One programmed it through various switchs, results were displayed on LED diodes.

Thanks to **Steve Perry** for information and pictures.

<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>