website/content/museum/logical-machine-corporation-lomac-david.md

---
title: Logical Machine Corporation (LOMAC) David
categories:
- Computers
types:
- Professional Computer
origins:
- U.S.A.
years:
- '1980'
cpus:
- Intel 8086
params:
  name: David
  image: /media/museum/photos/logical_david_1s.jpg
  company: /companies/logical-machine-corporation-lomac
  company_name: Logical Machine Corporation (LOMAC)
  specs:
  - label: NAME
    value: David
  - label: MANUFACTURER
    value: Logical Machine Corporation (LOMAC)
  - label: TYPE
    value: Professional Computer
  - label: ORIGIN
    value: U.S.A.
  - label: YEAR
    value: '1980'
  - label: KEYBOARD
    value: Fullstroke keyboard with numeric keypad
  - label: CPU
    value: Intel 8086
  - label: RAM
    value: 64 KB
  - label: TEXT MODES
    value: 24 lines x 80 characters
  - label: COLORS
    value: Monochrome display
  - label: I/O PORTS
    value: 2 x serial RS232C, parallel
  - label: BUILT IN MEDIA
    value: 8'' floppy disk drive (1.25 MB)
  - label: OS
    value: ALP
  - label: POWER SUPPLY
    value: Built-in PSU
  - label: PRICE
    value: |-
      $8500 (USA, 1980)\
      33000 FF H.T. (France, June 1982)
  tabs:
  - photos
  - adverts
  forum_thread: 1306
  photos:
  - title: DAVID
    subtitle: ''
    text: ''
    image: null
  - title: DAVID
    subtitle: ''
    text: ''
    image: null
  - title: COMPACT VERSION
    subtitle: ''
    text: |-
      In this version, the keyboard and monitor are integrated into a single unit.

      Thanks to Camiel Vanderhoeven for this picture
    image: null
  - title: COMPACT VERSION
    subtitle: ''
    text: Thanks to Camiel Vanderhoeven for this picture
    image: null
  - title: COMPLETE SYSTEM
    subtitle: ''
    text: Thanks to Camiel Vanderhoeven for this picture
    image: null
  - title: COMPLETE SYSTEM
    subtitle: ''
    text: Picture captured from an Italian magazine dated 1981
    image: null
  - title: ELECTRONIC BOARDS
    subtitle: ''
    text: |-
      These are the electronic boards found in the main case. On the right the disk controller board, and on the left the main board with CPU and RAM.

      Thanks to Camiel Vanderhoeven for this picture
    image: null
  - title: DISK CONTROLLER CARD DETAIL
    subtitle: ''
    text: Thanks to Camiel Vanderhoeven for this picture
    image: null
  - title: MAIN BOARD DETAIL
    subtitle: ''
    text: Thanks to Camiel Vanderhoeven for this picture
    image: null
  - title: INSIDE
    subtitle: ''
    text: Thanks to Camiel Vanderhoeven for this picture
    image: null
  adverts:
  - title: FRENCH ADVERT (JUNE 1982)
    subtitle: ''
    text: ''
    image: null
  oc_id: 1341
  source:
    url: https://web.archive.org/web/20230609042310/http://www.old-computers.com/museum/computer.asp?c=1341
    date: '2023-06-09'
---

The David is not the first computer released by Logical Business Machines. In 1974, LOMAC (Logical Machine Corporation) released the Adam. Some times later they also produced **Tina** (for TINy Adam). There was also the **Goliath**, a data storage server with 5MB hard drive. Goliath could be connected to up to 20 Davids or Tinas. David and Goliath names makes a clear reference to the mythical story found in the biblical Book of Samuel.

The David is powered by a 16-bit Intel 8086 CPU with 64KB RAM, and equipped with a 8'' dual sided double density floppy drive unit (1,25MB capacity). The video display unit shows 24 lines of 80 characters each, and an upper and lower case character set with descenders. David’s printer also features upper and lower case in a 7 x 7 matrix. Type size variance allows 40, 66, 80 and 132-column format in eight inches because character pitches of 5, 8.25, 10 and 16 can be selected within a program. Optional wider carriage and faster printers were also provided.

The computer itself was available in two cosmetic models: one with a detachable keyboard (pictured here) and another where display unit and keyboard are put into a monobloc case (see pictures section). There are two RS232C and one parallel connector. It's also possible to connect a second display, which is independent. You can edit programs on one and display the results on the second display.

But the most original feature of the David is not its hardware or cosmetic details, it is its operating system and language !

Logical Business Machines was an american company based in Sunnyvale, California. It was founded by John Peers, prior to creating ‘The Byte Shop’, one of the first successful chains of personal computer stores. His studies in human learning in the 70s led him to a neurological emulations approach in computing, now better-known as neural networking technology. In 1982, Mr. Peers also founded Novix, Inc., specializing in the design of high-speed microprocessors and software optimized for neural and massive parallel computing. John McAfee was vice President of engineering at Logical (at least in 1983/1984).

This historical background is necessary to explain why the David computer was so special. The philosophy behind the David and its operating system/language called ALP, is that the user is not necessarily a computer expert. Thus the system let the user create its own language based on verbs, words, nouns, numbers or expressions. Verbs call actions for example and can be used to create and index files, manipulate data, prompts the user to enter data, while nouns represent the user's data. Thus the user communicate with the computer via a "natural" language conceived by the user itself. It's the difficult to explain how it works, but the concept was revolutionary at the time. This natural language was the predecessor of PRAGMA (that is still used today).

Sadly, these computers and their concept didn't sell well and very little is known about them. Any testimonies or memories are welcome !

In 1983, Logical released another computer: [the L-XT](/museum/logical-machine-corporation-lomac-l-xt/) which was based on the same natural language concept but also MS-DOS compatible.

<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>