MACHINE REFERENCE

Interton VC 4000

Name: Interton VC 4000
Brand: Interton (Interton Electronic GmbH, Frankenthal, West Germany, primarily a hearing-aid manufacturer)

The Interton VC 4000 went on sale in West Germany in 1978 for 298 Deutschmarks, built by a company that had spent the previous two decades making hearing aids rather than toys. Two joystick-and-keypad controllers plugged into a console the size of a large box file, a cartridge slot took ROM “cassettes” of up to 6 kilobytes, and the whole thing ran on a Signetics 2650A processor with a working memory measured in bytes rather than kilobytes.

Why it matters

Interton got a programmable, cartridge-based console onto German and wider European shelves in 1978, arriving in some markets before Atari’s VCS did. Its Signetics 2650A CPU and 2636 video chip were shared with a whole family of licensed and compatible machines sold under other names: the Voltmace Database in Britain, Radofin’s own 1292 Advanced Programmable Video System, Hanimex’s version in Australia, Prinztronic’s VC-6000. A cartridge bought for one would often, within limits, run on several of the others. Across five years on sale the VC 4000 itself managed 38 released titles, from Grand Prix to Blackjack, before Interton dropped it in 1983.

What to check before you buy

Original units shipped for 220-240V European mains with period plugs and connectors; a US buyer needs a proper step-down transformer, not just a plug adapter.
Picture quality out of the box is RF-only, and the RF modulator was never the design's strong point. Many surviving consoles have already had a composite AV modification fitted by a previous owner, which is a fair improvement rather than a red flag.
Test both controllers fully. The 12-button keypad under each joystick handles menu and game-select functions on several cartridges, so a dead key can leave a game unplayable rather than merely awkward.
Ask exactly what cartridges come with the console. Slot dimensions varied across the wider 1292 family, so a cartridge advertised as compatible from a Radofin or Voltmace machine is not guaranteed to fit.
Inspect the cartridge edge connector for corrosion. The cartridges are approaching fifty years old, and a dirty or oxidised connector is the single most common reason a plugged-in game shows nothing at all.
Given how obscure this machine is outside Germany, expect thin documentation and a small parts-sharing community. Factor that into any repair plan before buying a unit listed for spares or untested.

Photo: Tomasz Sienicki, Wikimedia Commons (CC BY 3.0)

Released

1978

RAM

Sources disagree: one gives 37 bytes of data memory, others give 43 bytes. The discrepancy could not be resolved from available sources; either way it is in the tens-of-bytes range, not kilobytes

CPU

Signetics 2650A, 0.887 MHz. One source gives 4.43 MHz, but that figure matches the PAL colour subcarrier frequency rather than a CPU clock and looks like a transcription error; 0.887 MHz is corroborated by two other sources and is best supported

Launch price

298 Deutschmarks

Manufacturer

Interton (Interton Electronic GmbH, Frankenthal, West Germany, primarily a hearing-aid manufacturer)

Form factor

Second-generation home video game console; cartridge-based, two hardwired detachable controllers

CPU

Chipset

Signetics 2650A CPU paired with a Signetics 2636 Programmable Video Interface, which handles graphics and sound together

RAM

Sources disagree: one gives 37 bytes of data memory, others give 43 bytes. The discrepancy could not be resolved from available sources; either way it is in the tens-of-bytes range, not kilobytes

ROM

No onboard ROM beyond boot/character logic; games supplied entirely on cartridge

Graphics

Signetics 2636 PVI; roughly 128×200 resolution, with four single-colour sprites (one of which can show 8 colours) plus a 4-digit BCD scoreline. Sources are inconsistent on exact colour count, so treat the palette as very limited rather than a fixed number

Audio

Built into the same 2636 chip rather than a separate sound chip: simple single-channel tones and noise (one source describes it as “3 noises”); no music or multi-voice capability

Storage

ROM cartridges, which Interton’s own packaging and documentation called “cassettes”; capacities of 2K, 4K and 6K are documented across the range

Ports

Cartridge slot; two hardwired joystick-and-12-button-keypad controllers; RF output to the TV aerial socket only as standard, no factory composite or video output

None. A dedicated cartridge console with no OS; each cartridge contains complete, self-contained game code

PSU

External mains adapter for 220-240V European supply. One hobbyist source describes internal rails of roughly 15V/8V AC in, regulated to 12V/5V, but this was not confirmed against a manufacturer spec sheet

Units sold

Unknown. Not stated in any source checked

Successors

None from Interton directly. The VC 4000 sits within the wider 1292 Advanced Programmable Video System family: Signetics 2650/2636-based machines that were largely software-compatible and sold under other brand names, including Radofin’s own 1292, Voltmace/Videomaster’s Database, Hanimex’s Australian version, Prinztronic’s VC-6000 and Audiosonic’s PP-1292/PP-1392. These were parallel licensed variants rather than successors

RF-only video output ages poorly

The VC 4000 left the factory with RF output through a modulator only, and hobbyists widely regard it as the weakest part of the design; German modding forums and repair blogs document removing the modulator entirely and wiring composite video/audio/ground out directly as a common, well-established fix.
Original power supplies are a common failure point

German retro-computing forums host active discussion of the VC 4000's external PSU failing and of hobbyists building regulated replacement supplies rather than trust 45-plus-year-old originals, a sign this is a known weak point on surviving units, though a precise failure mechanism was not confirmed in available sources.

1978 Interton launches the VC 4000 in West Germany for 298 DM, reaching the UK, France, Spain, Austria, the Netherlands and Australia the same year
1979 Radofin licenses the same Signetics 2650/2636 platform as the 1292 Advanced Programmable Video System, sold under names including Voltmace/Videomaster, Hanimex, Prinztronic and Audiosonic
1979 Interton and its licensees begin releasing cartridges across the compatible family; 38 titles are eventually released for the VC 4000 itself
1983 Interton discontinues the VC 4000 after five years on sale
2010 Composite AV modifications and hobbyist board repairs begin keeping surviving consoles usable on modern televisions