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HDMI/DVI: TFP410

A project log for Z80 + RP2350B ZX-compatible homebrew retrocomputer

ZX Spectrum-compatible homemade retrocomputer based on Z80 CPU + discrete RAM and ROM + Raspberry RP2350B as ULA/chipset

vladVlad 07/19/2026 at 17:490 Comments

Finally, at least for now, I've decided to go with TFP410. It is exactly what is needed for my task to translate video output BRGB+HSYNC+VSYNC into TMDS for DVI-digital. The circuit diagram I created for an adapter board:

The AND-gates will be 74LVC08. I didn't found this symbol in KiCAD but it is not a problem. I will also need to generate pixel clock signal 27MHz and Data Enable signal in my rp2350b ULA firmware but is not an issue too because I have 2 additional GPIOs available that were initially planned specifically for HDMI output support.

Current PCB design:

A real challenge will be soldering of TQFP-64 chip with my hand solderer manually.

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