Predecessor was the Sinclair Spectrum. A successors was e.g. the Spectrum 128 (128 kB RAM, 3-channel audio chip AY-3-8912, MIDI, RS-232, RGB monitor connection and improved BASIC). After Sinclair was taken over by the company Amstrad, the models Spectrum +2/+2A and Spectrum +3 with either cassette or 3" floppy disk drive built-in were launched.
The slightly larger case looks more modern than other computers of the time, thanks to the key shape and black color. However, the pressure point of the keys is still not optimal. There is now a larger and better placed space bar and more keys so fewer key combinations were necessary. A power LED, which indicates when the device is in operation, still does not exist.
At the back are only a few connections. A TV modulator that delivers a lousy picture is the only way to output a video signal. The sound is played by the internal speaker and not transmitted to the TV. Two jack plugs for headphones and microphone are used to connect a cassette drive as a mass storage device. The required cables were included. An external 9V power supply and a large expansion port complete the connection options. The latter is also urgently necessary because the Spectrum does not even have joystick ports by default.
At the back is the speaker on the bottom left. Embossed into the plastic is the model name. There are also two supports on the bottom, with which the keyboard could be angled.
The Spectrum consists of only a few ICs, including the processor (Zilog Z80A at 3.5 MHz) and a custom IC called "uncommitted logic array" (ULA), which took over all tasks regarding graphics, sound and tape drive. Every cassette drive could be connected - special "data cassette" drives, such as those sold by Commodore, were not needed. On the bottom left is the 48 KB memory. The simple sound output was via the built-in speaker; No sound was transmitted to the TV.
The power-on message of the Sinclair ZX Spectrum. You could not type commands letter by letter as usual with other computers, but each key was assigned to several commands so you don't have to type them in. On the keyboard of the Spectrum +2, however, most commands are no longer printed to the keys, which makes operation difficult.
|Processor:||Z80A (3,5 MHz)|
|operating system:||Sinclair BASIC|
microphone (cassette recorder)
headphones (cassette recorder)
|Units sold:||5 Millions (all versions)|
The above shown computers are in the collection!
Compatible drives for the computer Sinclair +:
- none in collection
- none in collection