Difference between revisions of "CPU Speed control"
From SpecNext official Wiki
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* Turbo off, or turbo on and $07 set to #00: 3.5 Mhz (standard clock). | * Turbo off, or turbo on and $07 set to #00: 3.5 Mhz (standard clock). | ||
| − | * Turbo on, $07 set to #01: 7 Mhz (x2). (Standard for [[Reference | + | * Turbo on, $07 set to #01: 7 Mhz (x2). (Standard for [[Reference machines|Pentagon]]). |
| − | * Turbo on, $07 set to #10: 14 Mhz. | + | * Turbo on, $07 set to #10: 14 Mhz. (x4) |
| − | * Turbo on, $07 set to #11: 28 Mhz. Some features, such as [[Layer 2]] drawing, are disabled at this speed. | + | * Turbo on, $07 set to #11: 28 Mhz. (x8) Some features, such as [[Layer 2]] drawing, are disabled at this speed. |
Revision as of 23:51, 18 August 2017
Acceleration, or Turbo mode, allows the Next to run at faster clock speeds than a standard Spectrum.
Acceleration is enabled via Peripheral 2 Register ($06) and configured via CPU Speed Register ($07), or via a user control. There are four potential settings: