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31 May 2024, 12:28
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#1 |
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Registered User
Join Date: Feb 2016
Location: London
Posts: 352
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Amiga CPU heat load
Do Amiga cpu (680X0) get hotter under load? Or are they running at full speed continuously?
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31 May 2024, 12:34
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#2 |
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Registered User
Join Date: Jan 2002
Location: Germany
Posts: 7,032
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It depends on the software. The OS sets the CPU to sleep when there is nothing to do. But games and demos might constantly be polling for input.
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01 June 2024, 10:38
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#3 |
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Senior Member
Join Date: Jun 2001
Location: Germany
Posts: 1,667
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Depends on the CPU. Only the 060 has energy-saving capabilities. All other 68k CPUs just run, no matter what the software does.
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01 June 2024, 11:45
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#4 |
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Registered User
Join Date: Sep 2019
Location: Finland
Posts: 374
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As thomas said there is the instruction STOP:
"This is a privileged instruction that first copies its operand (which is an immediate word value) into the status register and then halts the processor. The processor will remain in this state until it receives an interrupt that is not masked by the interrupt mask into the status register." AmigaOS uses this instruction when there's nothing to do. This might lead to CPU power usage dropping, but this I don't know for a fact 
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