What is the right register value for black in the palette?
The official one, which Nintendo recommends is either $0E or $0F. Palette value $0D is the blackest value of them all, but it is what’s known as “blacker than black”. In other words, some video monitors or television screens might not accept that colour as a valid NTSC colour value. It has been said that it might even cause some video screens to interpret it as another blanking signal, and mess up their synching rates. However, I have been using $0D in my demos with no problems to my screens. Your mileage may vary, of course. • What are the colour emphasis bits? This is almost the final frontier of NES emulation, as not many emulators handle these bits properly. The top 3 bits of $2001 are known as the “Colour Emphasis Bits” because each bit modifies the R, G, or B colour component of the NES’ display. The bits look like this in $2001: BGRxxxx. If you set one of these bits, the entire palette changes dynamically towards the colour component selected in the bits. If you set the Red bit,
