ZX Spectrum 16K/48K edge connector: Difference between revisions
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====CPU Clock==== | ====CPU Clock==== | ||
The {{overline|CK | The {{overline|CK}} signal, sometimes referred to as PHICPU or ΦCPU is available on Lower Pin 8. This clock signal is generated by the [[The Spectrum ULA|ULA]] and is interrupted during [[contended memory]] access. This clock signal is inverted by a transistor switch to provide a clean clock edge for the Z80. | ||
====IO Request Signals==== | ====IO Request Signals==== |