The Zx Spectrum Ula How To Design A Microcomputer Zx Design Retro Computer Portable -

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If your goal is a portable device, focus on these integration steps: Building a Pocket ZX Spectrum | PDF - Scribd : If your goal is a portable device,

A modern portable design should include: : If your goal is a portable device,

The original ULA generated an analog RF or composite signal. For a modern portable device, you will want to target an integrated LCD screen or a standard VGA/HDMI output. : If your goal is a portable device,

: Dividing a 14MHz master clock to provide 7MHz for video and 3.5MHz for the Z80 CPU.