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yann64andClaude Opus 5.5 b274874139 All machines linked to their forum thread (full comment import)
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
2026-10-13 17:26:43 +02:00

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---
title: Billings BC-12
categories:
- Computers
types:
- Professional Computer
origins:
- U.S.A.
cpus:
- Z80A
params:
name: BC-12
image: /media/museum/photos/billings_system_s1.jpg
company: /companies/billings
company_name: Billings
specs:
- label: NAME
value: BC-12
- label: MANUFACTURER
value: Billings
- label: TYPE
value: Professional Computer
- label: ORIGIN
value: U.S.A.
- label: BUILT IN LANGUAGE
value: None
- label: KEYBOARD
value: 96 key with numeric keypad, 15 function keys and arrow keys
- label: CPU
value: Z80A
- label: SPEED
value: Unknown
- label: CO-PROCESSOR
value: Unknown
- label: RAM
value: 64 KB with parity
- label: VRAM
value: Unknown
- label: ROM
value: Unknown
- label: TEXT MODES
value: 80 columns x 25 lines. Geen phosphor CRT memory mapped graphics characters, U/l case
- label: GRAPHIC MODES
value: None
- label: COLORS
value: Monochrome
- label: SOUND
value: Unknown
- label: I/O PORTS
value: 2 x Serial, 1 x Parallel
- label: BUILT IN MEDIA
value: 2 x 5.25'' 160 KB Single Sided Double Density FDD (can drive up to 4)
- label: OS
value: OASIS - Several languages and professional software were available
- label: POWER SUPPLY
value: Built-in PSU
- label: PERIPHERALS
value: Unknown
- label: PRICE
value: Unknown
tabs:
- photos
- adverts
- docs
forum_thread: 1019
photos:
- title: SYSTEM
subtitle: ''
text: ''
image: /media/museum/photos/billings_system_s2.jpg
- title: KEYBOARD CLOSE-UP
subtitle: ''
text: ''
image: /media/museum/photos/billings_keyboard_s1.jpg
- title: MAIN BOARD
subtitle: ''
text: ''
image: /media/museum/photos/billings_inside_s1.jpg
adverts:
- title: 6000 MODEL
subtitle: ''
text: |-
Advert says:\
WE HAVE A NEW APPROACH TO DISTRIBUTED PROCESSING THAT WORKS
Already implemented are electronic mail, word processing, complete cost accounting with inventory control and more. The secret is a new technology called Functionally Structured Distribution (FSD). At last, a system to organize and manage distributed processing applications that is really up and running. FSD technology is especially applicable to installa­tions that require:\
• Unlimited expandability supporting extremely large data bases and terminals in many cities.\
• User-friendly software easily programmed in high level languages (COBOL, FORTRAN, and BASIC)\
• System reliability (due to distributed hardware) while maintaining multiple levels of data security.\
• Compatibility with existing mainframes and networks (including the Bell System).
We are presently installing Billings 6000 Computer Systems which take full advantage of distributed processing utilizing FSD technology. The 6000 Computer supports multiple hard disk drives with capacities of up to 64 Mbytes (formatted), streaming tapes for backup, auto-dial modems (2400 baud synchronous) for communications, and flexible disk drives for smaller installations.
image: /media/museum/pubs/billings_6000_pub_s1.jpg
docs:
- title: SYSTEM QUICK REFERENCE GUIDE
url: null
cover: /media/museum/docs/couvs/quick-reference-guide_system_couv.jpg
text: |-
**SYSTEM QUICK REFERENCE GUIDE**\
written by Phase One Systems
 compiled/archived by Pablo Montini\
 type of document : PDF\
 size : 618 KB
**... READ THE ONLINE VERSION BY CLICKING BELOW :**
- title: BASIC QUICK REFERENCE GUIDE
url: null
cover: /media/museum/docs/couvs/quick-reference-guide_basic_couv.jpg
text: |-
**BASIC QUICK REFERENCE GUIDE**\
written by Phase One Systems
 compiled/archived by Pablo Montini\
 type of document : PDF\
 size : 316 KB
**... READ THE ONLINE VERSION BY CLICKING BELOW :**
oc_id: 1046
source:
url: https://web.archive.org/web/20221204094342/http://www.old-computers.com/museum/computer.asp?c=1046
date: '2022-12-04'
---
Virtually no information about this Z80 based computer - we even don't know its name - and the Billings Co. which name came from Mr. Billings, its founder.
Along with this machine, Billings also produced another system named 6000 which specialized in organizing and managing distributed processing applications (see advert section).
The operating system OASIS was a subset of IBM's CMS running on Virtual Machines (VM) of the IBM 370. The commands have the same syntax and the same options. The file names were the same as in CMS, "filename (8). extension (8): drive (1)"
You could connect two or more networked computers using the RS232 serial output in a ring topology. Making it possible to send files from one computer to another. The BASIC was very structured, with statements like: SELECT-CASE-CEND, IF-THEN-ELSE-IfEnd, WHILE-WEND, in addition to driving key indexed files with string.
---
**Contributors:** Pablo Montini
**Mike Gane** sent us this additional information:\
I used to have two of these in my office, I seem to recall that we bought them in or around 1980, initially as word processors, but the engineers soon took over one of the systems. The model was a BC12-FD, we paid around about £5000 for each machine.\
These systems came with Macro, Basic(compiled and interpreted versions, Assembler, word processing software and Fortran. There were single disk and dual floppy disk versions, ours both had dual disks. These systems were very nice to work with, the Word Processor capability was excellent and so simple to use, it used the function keys extensively to toggle on/off bold/italics/underlining etc.
We bought them to complement a PDP8 and an Intersil Intercept Junior (256 bytes of RAM, 4 \* 7 Segment LED Display) coupled to an ASR33 Teletype with punch paper reader/writer, which we were using to develop ground test software.\
We were to have integrated these systems into a ground station for downloading data from a flight recorder, but unfortunately technology advances caused us to buy WICAT WS150 systems and then these were replaced by Tektronix 8560’s (PDP 11/23 inside) which survived for many years before being replaced by a laptop.
Unfortunately the Billings BC12-FD’s were put in the skip along with the WICAT, shortly before I was able to rescue them when our factory shut in 1992. The Tektronix system went to another factory and was in service until about a year ago, when unfortunately spares became to expensive and rare to warrant it’s repair.
<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>