Topic : ATARI ST Picture formats
Author : David Baggett/Jan K⌐upka
Version : atari_gf.hyp 0.01 (17/09/96)
Subject : Documentation/File formats
Nodes : 52
Index Size : 1328
HCP-Version : 3
Compiled on : Atari
@charset : atarist
@lang :
@default :
@help :
@options : -i -s +y +z
@width : 75STAD *.PAC (high resolution only)
4 bytes "pM86" (vertically packed) or "pM85" (horizontally packed)
1 byte id byte
1 byte pack byte (most frequently occuring byte in bitmap)
1 byte "special" byte
7 bytes total for header
? bytes data
The data is encoded as follows. For each byte x in the data section:
x = id byte Read one more byte, n. Use pack byte
n + 1 times.
x = "special" byte Read two more bytes, d, and n (in order).
Use byte d n times.
otherwise Use byte x literally.