VTech Laser 200

VTech Laser 200

The VTech Laser 200, rebadged as a Dick Smith VZ200
Manufacturer Video Technology
Type Personal Computer
Release date November 1983 (1983-11)[1]
Introductory price $99USD
£98GBP
Discontinued 1985 (1985)
Units sold 200,000 in Australia
Media Cassette tape, Disk drive
Operating system BASIC V2.0
CPU Zilog Z80A clocked at 3.58 MHz, Motorola 6847 video processor
Memory 6-22KB USER-RAM + 2KB VRAM, 16KB ROM
Display 32×16 (8 colors), 128×64 graphics (2 background, 3 foreground colors)
Input 45 key Keyboard
Power 10 volt
Dimensions 29 × 17 × 4cm
Weight 800g
Predecessor VTech Laser 110
Successor VTech Laser 310

The VTech Laser 200 was an early 8-bit home computer from 1983, also sold as the Salora Fellow (mainly in Fennoscandia, particularly Finland), the Seltron 200 in Hungary and Italy, the Texet TX8000 (in the United Kingdom), and the Dick Smith VZ 200 (in Australia and New Zealand).

The machine ran basic games on cassette such as "Hoppy" (a version of Frogger), "Cosmic Rescue" (Scramble), "VZ Invaders" (Space Invaders) and Moon Patrol. The Laser 210 / VZ200 computer was discontinued in 1985.

Release

At its UK launch, Texet claimed that the £98 TX8000-branded version was the cheapest colour home microcomputer on the market. However, this was not enough to ensure its success against the dominant ZX Spectrum and similar machines already on sale.[2] Most notably, the Spectrum-like Oric-1 was selling for £99 at this point, and offered a far higher specification than the Texet for little difference in cost.

The "Dick Smith"-badged VZ 200 was more successful in Australia, where it proved popular as a first computer.[3]

An improved version known as the VTech Laser 310, or the Dick Smith VZ 300 featured a full travel keyboard and 8K ROM software based Floppy Disk Controller, was released in 1985 and continued until 1989.[4]

Technical specification

The Laser 200 was designed and built by Video Technology (VTech) in Hong Kong and derived from the Tandy TRS-80. Based on a Zilog Z80A CPU driven by a television colour burst crystal (3.5795454 MHz) (in PAL, NTSC and Seacam), it offered 16 KB of ROM containing Microsoft BASIC Level II, 8 kB RAM (2 kB for video memory) for the PAL model, whilst the NTSC and Seacam models had 6 kB RAM (2 kB for VRAM) and four-colour graphics at a resolution of 128×64 or 64×32, or 32 columns and 16 lines of eight-colour text. Because there is only 2 kB of VRAM, only one of the video display modes of the MC6847 Video Display Generator (VDG) chip is available, effectively disabling the higher resolution 256×192 mono colour mode. There were a few unofficial "mods" developed that increased the VRAM and enabled the 256×192 mode that the MC6847 was capable of, a number of programs were written (mainly) by German user groups that used this particular modification. Rather crude sound effects could be achieved by a built-in push/pull piezo speaker via its BASIC, though 1-bit synth and sampling sound can be produced through both raw Z80 assembly as well as libraries within the Z88 Development Kit.

The BASIC interpreter was similar to that offered in the Video Genie but with many of the advanced BASIC commands disabled be default. Various utilities were written to re-enable these commands.

Laser 310 / VZ 300

The Laser 310 was released in 1985 throughout parts of Europe and the United States. It was named and sold as the The "Dick Smith" VZ 300 throughout Australia and New Zealand. Also based on a Zilog Z80A CPU with a slightly updated 16k ROM version, it was driven by a television colour burst (3.54 MHz) crystal. It came with 16k of RAM for programming, along with the same 2k of Video Ram as that of the Laser 200.

The VZ300 computer, showing early and late model keyboards.


Peripherals

Within a year of the Laser 310's release, an 80k disk drive unit was released on to the market, of which two could be connected to the computer at the same time. A plug-pack cartridge containing the DOS ROM was required to operate the drives. The DOS ROM and diskette drives were backwards compatible with the Laser 200. A number of other VTech designed plug-in peripherals were also available for both the Laser 200 and Laser 310 computers. Among them were joysticks, cassette drive, light pen, printer plotter, 75 baud MODEM, word processor cartridge, and the 16k and 64k extended RAM cartridges. As numbers of users grew, so did the number of home-made kits which were on offer, which included a Speech synthesizer, SN6847AN music synthesizer, EEPROM programmer, data logger, 300 baud MODEM, full 101 keyboard, and a RTTY Ham radio kit.

The VZ200 and VZ300 datasettes along with the VZ200 Printer Plotter.


Software

With both of their releases in Germany, England, USA, Italy, Australia, New Zealand and a few other countries, commercially based software titles grew and were distributed throughout various outlets in their home countries. Throughout Germany, Sanyo distributed a number of high quality software graphics, cassette and disc utilities. The Big W and Dick Smith Electronics store fronts throughout Australia and New Zealand sold many titles, including educational and graphical games, finance programs and various software utility tools, most of which have been found and transferred for the use in the various emulators. Unfortunately there are a number of known software packages that have simply been lost through the age of time.

Emulators

A number of emulators have since been written for these models of computers:

References

  1. ↑ Video Technology LASER 200 / 210 OLD-COMPUTERS.COM Museum
  2. ↑ Bennett, Bill, Texet TX-8000 review, Your Computer magazine, April 1983. Retrieved 2007-03-21.
  3. ↑ Dick Smith VZ-200, thepcmuseum.com. Retrieved 2007-03-21.
  4. ↑ Video Technology Laser 310, old-computers.com. Retrieved 2007-03-21.
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