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/* Hardware description */
All CPC models were based on a Zilog Z80 processor clocked at 4 MHz. Because a common pool of RAM is shared with the video circuits, the Z80 may only make a memory access once every four cycles, which has the effect of rounding all instruction cycle lengths up to the next multiple of four. For details, see [http://www.grimware.org/doku.php/documentations/devices/z80 a nearly complete list of instructions with timings (number of cycles) for each.]
The system came with 64 KB or 128 KB of RAM depending on the model (capable of being expanded to 576kmore). The machines also featured a standard 9-pin Atari-style joystick socket which was able to take two joysticks via a splitter.
The machines' dimensions are:
