Hi Peter,
Long ago, on Sun 13 Apr 1997, Peter wrote to All:
 PL> INT 10 U - VIDEO - READ PEL MASK (VGA/MCGA)
 PL>         AX = 1019h
 PL> Return: BL = value read
 PL> INT 10 U - VIDEO - SET PEL MASK (VGA/MCGA)
 PL>         AX = 1018h
 PL>         BL = new PEL value
 PL> Experimenting with them shows that calling the latter
 PL> function does funny things with the colours on your screen.
 PL> The question: what is the PEL, what is its mask, and what is
 PL> the purpose of the latter function ?
Check his port-list at around &H3C8. There are the (much faster) ports to do 
the same thing.
The color to put on screen is masked with this value.
Martijn
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