Spectrum keywords: BORDER Traditional Cache

The Sinclair ZX Spectrum was one of the most popular European computers of the 80's. Two models were launched: one with 16 kb RAM and one with 48 kb RAM. After the success of previous computers, the ZX-80 and particularly the ZX-81, in April 1982 Sir Clive Sinclair released the ZX-Spectrum. For the first time, a computer with high-resolution graphics, colors, sound was available.

The unique feature of the ZX Spectrum keyboard characters comprises not only the single symbols (letters, digits, etc), but also the compound tokens (keywords, function names, etc) and all these are entered from the keyboard rather than being spelled out individually.

To obtain all these functions and commands, some keys have five or more distinct meanings, given partly by shifting the keys (i.e. pressing either the CAPS SHIFT key or the SYMBOL SHIFT key at the same time as the required one) and partly by having the machine in different modes.

Keyword BORDER definition follows;

Sets the colour of the border of the screen and also the paper colour for the lower part of the screen. Error K if m is not in the range 0 to 7.

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