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Gate Array

3 bytes removed, 10:09, 31 August 2024
/* Bus arbitration */
In fact, the Gate Array allows the Z80 to access the RAM in only 1 out of every 4 cycles. As a result, all instruction timings are stretched so that they are all multiples of a microsecond (1µs), and this gives an effective CPU clock of 3.3Mhz.

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Unlike the ZX Spectrum or the Amiga, this where bus arbitration is not limited only restricted to the "chip RAM". On , on the CPC, it also applies to ROM access and to RAM expansions. So the Z80 always runs at the same speed, regardless of the type of memory it accessesbeing accessed.
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Phi2x
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