%% 'bor' operations.
(-1 bsl 28) bor 0 = -1 bsl 28.
0 bor (-1 bsl 28) = -1 bsl 28.
(-1 bsl 28) bor (-1 bsl 28) = -1 bsl 28.

%%(-1 bsl 28) bor -16#FFFFffff = -16#10000001. Not sure about the result yet.

%% 'band' operations.
(-1 bsl 28) band 16#FFFFffffFFFF = 16#FFFFf0000000.