Two Bits-Per-Pixel Format

Two bits-per-pixel format is typically used for four-level grayscale displays, although any 4-entry palette will work. Gray levels are represented according to the following table:

Bit 1 Bit 0 Gray Level
0 0 Black
0 1 Dark Gray
1 0 Light Gray
1 1 White

Memory for this format can be arranged like this: