|
|
|
|
The Dragon 32 and Dragon 64 are home computers that were built in the 1980s. The Dragons are very similar to the TRS-80 Color Computer (CoCo), and were produced for the European market by Dragon Data, Ltd., in Port Talbot, Wales. The model numbers reflect the primary difference between the two machines, which have 32 and 64 kilobytes of RAM, respectively.  Dragon 32编辑本段回目录 In the early 1980s, the British home computer market was booming. New machines were released almost monthly. In August 1982, Dragon Data Ltd joined the fray with the Dragon 32. In the private home computer market, where games were a significant driver, the Dragon suffered due to its graphical capabilities, which were inferior to other machines such as the Sinclair ZX Spectrum and Commodore 64. The Dragon was also unable to display lower-case letters easily. Some more sophisticated applications synthesised them using high-resolution graphics modes (in the same way that user-defined characters would be designed for purely graphical applications such as games). Simpler programs just managed without lower case.  This effectively locked it out of the then-blooming educational market, which came to be dominated by the Acorn-built BBC Micro. As a result of these limitations, the Dragon was not a commercial success, and Dragon Data Ltd collapsed in June 1984. Despite the demise of the parent company, Dragons still proved quite popular. They had a robust motherboard in a spacious case, and were much more tolerant of home-modification than many of their contemporaries, which often had their components crammed into the smallest possible space.  The Dragon was built around the Motorola MC6809E processor running at 0.89 MHz. For the time, this was a relatively sophisticated 8-bit CPU, with limited 16-bit capabilities. In terms of raw computational power, the Dragon beat most of its contemporary rivals (which were based on the older MOS Technology 6502 and Zilog Z80) but this made little difference in a market where graphical capabilities were much more important to consumers.  Both the Dragon and the TRS-80 Coco were based on a Motorola data sheet design for the MC6883 SAM chip for memory management and peripheral control. The systems were sufficiently similar that a significant fraction of the compiled software produced for one machine would happily run on the other. Software running via the built-in Basic interpreters also had a high level of compatibility, but only after they were re-tokenized (which could be achieved fairly easily by transferring via cassette tape with appropriate options). The Dragon had additional circuitry to make the MC6847 VDG compatible with european 625-line television standards, rather than the US 525-line US standard, and a parallel printer port not present on the Coco.  Dragon 64 编辑本段回目录 Dragon Data finally launched the Dragon 64 in August 1984. The Dragon 64 was functionally identical to the Dragon 32 and even booted into Dragon 32 compatible BASIC mode. The Dragon 64 contained 2 x 16K ROMS holding two different versions of BASIC - One was the a slightly modified version of the Dragon 32 BASIC which was still limited to 24Kb RAM, the other was specific to the Dragon 64 and allowed 48Kb of RAM to be available to the programmer by copying the BASIC ROM into RAM allowing the entire 64Kb of RAM to be available (16Kb allocated to the copy of BASIC).  Aside from the increase in RAM and the new BASIC, the 64 also had an RS-232 serial port which was not included on the 32.  A minor difference between the two Dragon models was the outer case color; the Dragon 32 was beige and the 64 was light grey. Besides the color and the Dragon 64's serial port (and the model name stickers, of course), the two machines looked exactly the same. 主要参数编辑本段回目录
 I have about 50 Tano Dragon 64 Computers to sell. 图说编辑本段回目录   相关链接编辑本段回目录参考文献编辑本段回目录
http://archive.worldofdragon.org/ http://en.wikipedia.org/wiki/Dragon_32/64 http://www.old-computers.com/museum/computer.asp?st=1&c=117 →如果您认为本词条还有待完善，请 编辑词条
词条内容仅供参考，如果您需要解决具体问题 标签: Tano Dragon Dragon 32/64 Dragon 32 Dragon 64
收藏到:
同义词: Dragon 32/64,Dragon 32,Dragon 64 关于本词条的评论 (共0条）发表评论>> | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
(France, november 83)