VGA32_16BPP, VGA32_TFT - External Memory Data Format

When using the VGA32_16BPP or VGA32_TFT 32-bit VGA Controller variants, the color quality is fixed at 16 bits per pixel. The VGA Controller does not create the output RGB value for a pixel through use of a color look-up table – rather the color information is stored in the external video memory in the correct format and used directly.

Each address in memory contains a 32-bit word. That word contains the RGB color information for two pixels, with each pixel represented by 16 bits (or 2 bytes). For pixels 0-1 for example, the 32-bit word in memory would be stored as follows: