This was capable of producing one channel with 10 octaves over ten semitones. Sound output was through a beeper on the machine itself. The Commodore 64 used colour attributes, but hardware sprites and scrolling were used to avoid attribute clash. Other machines available around the same time, for example the Amstrad CPC, did not suffer from this problem. This problem became a distinctive feature of the Spectrum and an in-joke among Spectrum users, as well as a point of derision by advocates of other systems. This led to what was called colour clash or attribute clash with some bizarre effects in arcade style games. The Spectrum had an interesting method of handling colour the colour attributes were held in a 32×24 grid, separate from the text or graphical data, but was still limited to only two colours in any given character cell, both of which had to be either bright or non-bright. The image resolution was 256×192 with the same colour limitations. Text could be displayed using 32 columns × 24 rows of characters from the ZX Spectrum character set, with a choice of 8 colours in either normal or bright mode, which gave 15 shades (black was the same in both modes).
#Sinclair zx spectrum portable portable#
The Spectrum's video output was through an RF modulator and was designed for use with contemporary portable television sets, for a simple colour graphic display. Sinclair's industrial designer Rick Dickinson was responsible for the machine's outward appearance.īased on a Zilog Z80A CPU running at 3.5 MHz, the original Spectrum came with either 16 kB or 48 kB of RAM. The Spectrum's hardware was designed by Richard Altwasser of Sinclair Research. ZX Spectrum 48K motherboard (Issue 3B - 1983) In 1982 through to 1986, the Department of Industry (DoI) allocated funding to assist UK local education authorities to supply their schools with a range of computers, with the ZX Spectrum proving useful for the control projects. In 1980–82 the UK Department of Education and Science had begun the Microelectronics Education Programme to introduce microprocessing concepts and educational materials. The Spectrum was the first mainstream audience home computer in the UK, similar in significance to the Commodore 64 in the USA the C64 was the main rival to the Spectrum in the UK market during the early 1980s. Originally dubbed the ZX82, the machine was later renamed the ZX Spectrum by Sinclair to highlight the machine's colour display, compared to the black-and-white of its predecessor, the Sinclair ZX81. The ZX Spectrum is a home computer released in the United Kingdom in 1982 by Sinclair Research Ltd. Related subjects: Computing hardware and infrastructure
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