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ZX Spectrum +2A/2B, +3/3B edge connector

96 bytes removed, 11:16, 12 November 2017
Notes on Connections
====CPU Clock====
The CKEXT signal is available on Lower Pin 8. The CPU clock signal is generated by the [[The Amstrad gate array|gate array]] (IC1) and is interrupted during [[contended memory]] access. This clock signal is fed into the Z80 via a series resistor. The CKEXT signal is inverted in relation to the CPU clock as it has been passed through a NOT gateinput.
====Key Slot====

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