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 The RGBtoHDMI interface converts the "digital" RGB video signal from vintage computers like the BBC Micro or PC MDA/CGA/EGA to HDMI or DVI compatible with most modern TV/Monitors. The interface comprises a Raspberry Pi Zero and a specially designed Hat containing a small CPLD. Custom firmware on the Raspberry Pi, in conjunction with the CPLD, is able to correctly sample each of the supported video modes to give a pixel-perfect rendition. The HDMI output is genlocked to the input so there are no frame drops, repeats or tears and it also has low lag of around 4 milliseconds.
 
-An addon analog interface is available for the 6 bit version of the converter to support a limited number of computers with a few levels of analog RGB / YUV output such as Amstrad CPC, Spectrum, Atom, Dragon or Tandy Color Computer, or monochrome composite output such as Apple II /IIe, UK101, Superboard II, ZX80 and ZX81. Note this interface can only distinguish a few analog levels and is not suitable for systems with many levels of RGB or YUV. 
+An addon analog interface is available for the 6-12 bit versions of the converter to support a limited number of computers with a few levels of analog RGB / YUV output such as Amstrad CPC, Spectrum, Atom, Dragon or Tandy Color Computer, or monochrome composite output such as Apple II /IIe, UK101, Superboard II, ZX80 and ZX81. Note this interface can only distinguish a few analog levels and is not suitable for systems with many levels of RGB or YUV. 
 
 One unusual feature of the converter is optional integer scaling where one original pixel on the computer is scaled to an exact number of lcd pixels without using any interpolation filtering. This results in the low resolution output from real hardware looking as clean and sharp as sources output at the native resolution of the lcd (see the gallery for examples) although you can use filtering if you prefer.