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|    comp.sys.atari.st    |    Discussion about 16 bit Atari micros    |    15,439 messages    |
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|    Message 15,028 of 15,439    |
|    Francois LE COAT to Michael Schwingen    |
|    Re: A German user here ???    |
|    30 Nov 15 00:46:00    |
      From: lecoat@atari.org              Hi,              Michael Schwingen writes:       >> MC68060 processor of my Hades060 is internally clocked at 120MHz.       >       > No, it is not. The MC68060 is superscalar (for integer, not floating-point),       > meaning it executes up to two integer instructions per clock cycle (in       > certain conditions). That means given the right instructions, it runs       > (nearly) *as fast as* a theoretical singlescalar CPU which runs at 120MHz,       > but the internal logic of the MC68060 is nevertheless only clocked at 60MHz.       > Also, with worst-case code, it falls back to singlescalar operation (see       > section 10.1 in the datasheet).       >       > The datasheet is quite clear in stating that internal logic is clocked at       > "clk" pin speed, not 2*"clk".              I won't argue. It's written 120MHz on the face side of the computer.       This has a meaning, because with the same external clock frequency,       60MHz and with a MC68040 CPU, it should be written 60MHz on the Hades040              Well, but I have a Hades060 machine since about twenty years now. I made       benchmarks, and it is fast as it was announced on its face side !              I'm not arguing about the Motorola's documentation, but real hardware.              ATARIstically yours,              --        François LE COAT       Author of Eureka 2.12 (2D Graph Describer, 3D Modeller)       http://eureka.atari.org/              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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