1.1 --- a/ULA.txt Sat Dec 22 02:22:47 2012 +0100
1.2 +++ b/ULA.txt Sun Jan 06 02:23:13 2013 +0100
1.3 @@ -333,6 +333,12 @@
1.4 14 10001000
1.5 15 10001000
1.6
1.7 +For example, where logical colour 0 has been mapped to a physical colour in
1.8 +the range 8 to 15, a bitmap of 00010001 would be chosen as its contribution to
1.9 +the inversion operation. (The lower three bits of the physical colour would be
1.10 +used to set the underlying colour information affected by the inversion
1.11 +operation.)
1.12 +
1.13 An operation in the interrupt code would then combine the bitmaps for all
1.14 logical colours in 2 and 4 colour modes, with the 16 colour bitmaps being
1.15 combined for groups of logical colours as follows: