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CopperMaster © Copyright 1990 by Jonathan Potter
CopperMaster provides an easy way to generate your own custom copper lists,
and generally brighten up your screen.
It runs only from the CLI, and takes one argument; the filename of a
"copper list". This copper list is presented in the following manner :
col x y rgb
col x y rgb
col x y rgb
col x y rgb
.
.
.
.
ad infinitum...
col is the colour register to be changed; this is a value from 0 to 31. x and
y are the x and y locations to make the change. Remember that the copper has
a horizontal resolution of 113, and a vertical resolution of 262 lines in NTSC
and 312 in PAL, but because there are only 8 bits of resolution for vertical
beam positioning, you must have an instruction for line 255, and then
additional instructions for line x-255 to reach lines greater than 256. That
is, to set line 260 a certain colour, you must
0 0 255 fff this changes to fff at line 255
0 0 10 000 this changes to 000 at line 260 (256 + 10)
rgb is a hex value representing the colour you wish to change to.
If you run Copper Master with no filename, it will reset any previous
changes to the copper list.
Jonathan Potter
P.O. Box 289
Goodwood, SA 5034
Australia
Phone : (08) 2932788