Table 2 PCX File Header Structure

Name            Bytes  Description
----------------------------------------------------------
PCX Flag        1      constant flag
Version         1      PCX version number
Encoding        1      run-length encoding flag
Bits per Pixel  1      number of bits per pixel per plane
Window          8      window dimensions
HDPI            2      horizontal image resolution
VDPI            2      vertical image resolution
Color Map       48     hardware R-G-B color palette
Reserved        1      (used to contain video mode)
NPlanes         1      number of color planes
Bytes per Line  2      number of bytes per scan line
Palette Info    2      palette interpretation
HScreen Size    2      horizontal screen size
VScreen Size    2      vertical screen size
Filler          54     initialized filler bytes