Sinclair ZX Spectrum 48K+
The ZX Spectrum 48K+, released in 1984, was a revision of the original 48K model, featuring a more robust case and an improved keyboard while keeping the internal hardware unchanged.
Key Features
Processor: Zilog Z80A (3.5 MHz)Memory: 48 KB RAM
Graphics: 256×192 resolution, 15 colors (limited by attribute clash)
Sound: 1-channel beeper
Storage: Cassette tape interface
Keyboard: Hard plastic keys replacing the rubber keys of earlier models
Sinclair ZX Spectrum 128K 'Toastrack'
The ZX Spectrum 128K, nicknamed the "Toastrack" due to its prominent heatsink on the side, was released in 1985. It was a significant upgrade, featuring more memory, better sound, and improved video output.
Key Features
Processor: Zilog Z80A (3.5 MHz)Memory: 128 KB RAM
Graphics: 256×192 resolution, same as previous models but with added video modes
Sound: AY-3-8912 sound chip (3-channel audio, vastly superior to the beeper)
Storage: Cassette tape interface, external RS232/MIDI ports
Keyboard: Full-sized keyboard similar to the Spectrum+ but with extra keys
Why Were They Important?
Improved Design: The Spectrum 48K+ offered a more durable and comfortable typing experience.Advanced Sound & Memory: The Spectrum 128K introduced vastly improved audio and greater memory capacity, enabling more complex games and software.
Spanish Market Influence: The Spectrum 128K was initially released in Spain before coming to the UK, showing its global appeal.
Legacy
The Spectrum 48K+ set the stage for a sturdier, professional-looking design, while the Spectrum 128K 'Toastrack' represented a major step forward in terms of hardware capabilities. The 128K model laid the foundation for future Spectrum variants like the +2 and +3.