How to know the notebook panel resolution during POST

The horizontal can get from EDID table bytes 0x38(lower 8 bits) and 0x3A(Upper 4:4 bits).
For example:
Bytes   Value
0x38      0xA0
0x3A     0x50

Horizotal = (Offset (0x3A) & 0xF0 << 4) + Offset (0x38)
               = (0x50 << 4) + 0xA0
               = 0x5A0 (Hex)
               = 1440 (Dec)

The vertical can get from EDID table bytes 0x3B(lower 8 bits) and 0x3D(Upper 4:4 bits).
For example:
Bytes   Value
0x3B      0x84
0x3D     0x30

Vertical = (Offset (0x3D) & 0xF0 << 4) + Offset (0x3B)
             = (0x30 << 4) + 0x84
             = 0x384 (Hex)
             = 900 (Dec)

Therefore, we can know the panel resoultion is 1440 * 900 for this example.