ZX80 - Definition. Was ist ZX80
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Was (wer) ist ZX80 - definition

HOME COMPUTER
Zx80; Sinclair ZX-80; Sinclair ZX80; ZX-80
  • Upgraded ZX80 showing the ZX81-style replacement keyboard overlay for use with the 8K ROM

ZX-80         
<computer> Sinclair's cheap personal computer with built-in BASIC, launched at the end of January 1980 at a computer fair in Wembley, UK. The processor was an {NEC 780-C} running at 3.25 MHz. It had 1KB of RAM, externally expandable to 16KB, and 4KB of ROM. It had RF video output to a TV, displaying 24 lines by 32 characters of monochrome text. An audio cassette recorder was used to save programs. The ZX-80 was sold in kit form for ?79.95 or ready-built for ?99.95. It was used by many UK hobbyists as a means of learning the basics of computing. Some remember the 1KB ZX-80 for the claim in its advertising that you could control a nuclear power station with it. The ZX-80 was succeeded by the ZX-81. http://home.t-online.de/home/p.liebert/zx80_eng.htm. Planet Sinclair (http://nvg.ntnu.no/sinclair/). {The Sinclair Story (http://sincuser.f9.co.uk/046/sstory.htm)}. (2002-08-30)
ZX80 character set         
  • ZX80 4K BASIC]] program that demonstrates all code points including BASIC keywords and nonprintable characters, the latter rendered as question marks except <code>CHR$(1)</code> rendered as a null string. Therefore the top line covers the 33 code points 0–32, the following 5 lines cover 32 each, and the last lines with keywords cover yet fewer.
CHARACTER SET
The ZX80 character set is the character encoding used by the Sinclair Research ZX80 microcomputer with its original 4K BASIC ROM. The encoding uses one byte per character for 256 code points.

Wikipedia

ZX80

The Sinclair ZX80 is a home computer launched on 29 January 1980 by Science of Cambridge Ltd. (later to be better known as Sinclair Research). It is notable for being one of the first computers available in the United Kingdom for less than a hundred pounds. It was available in kit form for £79.95, where purchasers had to assemble and solder it together, and as a ready-built version at £99.95.

The ZX80 was very popular straight away, and for some time there was a waiting list of several months for either version of the machine.

The ZX80, named after the Z80 processor, was designed by Jim Westwood. It featured a 3.25 MHz Z80 CPU, 1 KB of static RAM, and 4 KB of ROM. The machine had no sound output and used a simple RF connection to display on a household television. Video output was black-and-white and character-based. The firmware contained the Sinclair BASIC programming language, editor, and operating system. The only means of expansion was a slot opening at the rear of the case, which exposed an expansion bus edge connector.

The ZX80 was advertised as the first personal computer for under £100 and received praise for its value and documentation. However, it faced criticism for screen blanking during program execution, small RAM size, and the keyboard design. Sales reached around 50,000, and the UK led the world in home computer ownership during the 1980s. Original ZX80s in good condition are now sought after by collectors. Clones of the ZX80 include the MicroAce, NE-Z80, and the Microdigital TK80.