both set the *NextBASIC Editor* colours to green ink on black paper. You can see how the second one is derived by doing the following calculation: **(128\*0)+(64\*0)+(8\*0)+4** ``` SPECTRUM PAPER 1:SPECTRUM INK 6 ``` or ``` SPECTRUM ATTR 14 ``` set the *NextBASIC Editor* colours to yellow ink on blue paper. Try to figure out how the second variation works! The colour scheme applies to the standard 32-column editing mode as well as the hi-resolution 64/85 column modes. However, since *Layer 1,2* only allows 8 different colour schemes, the scheme used is the one with the same **PAPER** colour as standard mode. **SPECTRUM** can also be used with the **CHR$** modifier to set the number of columns in the NextBASIC editor. Its syntax is: **SPECTRUM CHR$** *n* where *n* is one of **32**, **64** or **85** for the available column modes. To switch for example to 64 column mode you should type: ``` SPECTRUM CHR$ 64 ``` Attempting to enter a value other than **32**, **64** or **85** as parameter will produce an **Integer out of range, 0:1** error. Finally, **SPECTRUM** used with the modifier **SCREEN$** can control the *NextZXOS* screensaver behaviour. The syntax is as follows: **SPECTRUM SCREEN$** *n,t* where *n* is the type of screensaver (**0** = bouncing box, **1**=blank screen) and *t* is the timeout in minutes from **0** to **127**. If *t* is **0** then the screensaver is *disabled* until the next reset. The screensaver will activate (after the selected timeout) whenever the machine is waiting for a key to be pressed under the following circumstances: - In menus, *Browser*, *Calculator*, *NextBASIC Editor* or while in the *Command Line* - During **INPUT** statements - During **PAUSE 0** statements - When **NEXT #n,var** is waiting for a keystroke from the **K**, **S** or **W** *channels* - When executing machine-code software that uses the IDE_BROWSER call, or the IDE_STREAM_IN call (accessing **K**, **S** or **W** *channels*) or an IDE_BASIC call accessing the previously listed *NextBASIC* statements. The screensaver will not activate when games are being run (unless they use the API calls listed above), or in 48 BASIC. ### Speed Control The ZX Spectrum Next has a much faster *CPU* than its predecessors operating in one of the following speeds: 3.5MHz (same as the original ZX Spectrum), 7MHz, 14MHz and finally 28MHz. *NextBASIC* by default will set the CPU to execute at 3.5MHz, a setting which can be changed using either the left and right **cursor keys** while in any *NextZXOS menu* or directly from *NextBASIC* by using the **RUN AT** command. The syntax of the latter is as follows: **RUN AT** *s* where *s* is a number from **0** to **3** (0=3.5 MHz, 1=7 MHz, 2=14 MHz and 3=28 MHz). For example, to execute a program at 28 MHz begin the program with a: