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26 November 2014, 23:08
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#1 |
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Going nowhere
Join Date: Oct 2001
Location: United Kingdom
Age: 50
Posts: 8,986
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multiple use of traps
Is constant use of traps (like the Atari ST does) a big strain on cpu resources?
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27 November 2014, 09:52
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#2 |
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Natteravn
Join Date: Nov 2009
Location: Herford / Germany
Posts: 2,496
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When comparing an OS call through TRAP with an AmigaOS call (using JSR d16(An)) then the TRAP requires approximately twice the number of cycles. Also RTE is a bit slower than RTS. The advantage of TRAP is that you switch into supervisor mode and may access protected system resources, which are otherwise unavailable in user mode (a feature which is not used on Amigas).
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27 November 2014, 10:53
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#3 | |
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Going nowhere
Join Date: Oct 2001
Location: United Kingdom
Age: 50
Posts: 8,986
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Quote:
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