Sinclair Spectrum 48k

ZX Spectrum

Featured Product

Launched in April 1982, the Sinclair ZX Spectrum was a revolutionary 8-bit home computer developed by Sinclair Research Ltd. as the successor to the ZX81. Featuring a Z80A CPU, color graphics, and either 16KB or 48KB of RAM, it was priced to appeal to the mass market. Its iconic rubber keyboard, affordability, and easy-to-learn Sinclair BASIC made it a smash hit, especially in the UK and Europe. The Spectrum became a platform for bedroom coders, indie game developers, and a booming software ecosystem. Over 5 million units were sold, cementing its legacy as one of the most influential computers in history.

Notable Features
  • Full-color graphics at low cost (with the famous “color clash”)
  • Innovative tokenized BASIC input with shortcut keypresses
  • Rainbow stripe became an iconic design symbol
  • Spawned legendary UK game developers: Ultimate Play the Game, Ocean, Codemasters
  • Early platform for hobbyist programming and creative development
Historical Significance
  • Established the UK as a global hub for indie game development
  • Widely used in schools, homes, and by bedroom coders
  • Massive commercial software library – games, educational tools, and more
  • Continued development by Amstrad after acquiring Sinclair in 1986
  • Influenced the design of low-cost computing throughout Europe and South America
Collectors Notes
  • Rarity: Moderate (millions made), but early 16K and Issue 1 boards are collectible
  • Desirability: Extremely high – iconic in both computing and gaming history
  • Common Issues:
    • Failing rubber keyboards
    • Leaky electrolytic capacitors
    • Dead DRAM chips
    • Power supply failures

Specifications

Technical Information
NameZX Spectrum
ManufacturerSinclair Research Ltd
LaunchedFriday, April 23, 1982
Discontinued1/1/1986
CountryUnited Kingdom
CPUZ80A
Power9V DC (external PSU)
ExpansionEdge connector for peripherals, joysticks, RAM, printers
StorageCassette tape (1200 baud typical), MIcrodrives, Floppy Drives
Keyboard40-key rubber keyboard with BASIC keyword shortcuts
Sound1-bit beeper (later models added AY-3-8912 sound chip)
ROM16 KB (BASIC interpreter, OS routines)
RAM16 KB or 48 KB
DisplayTV output – 256×192 pixels, 15 colors (with attribute clash)
CPU Speed3.5 MHz

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