I have added in a new function, bit_clr(), which will clear a range of bits: bit_clr($int, $lsb, $nbits);. Here's a small sample of my test file. This functionality will be available in the next release. Thanks for the suggestion!

Sample part of test file:

is bit_bin(bit_clr(255, 0, 8)), '0', "255, 0, 8 ok";
is bit_bin(bit_clr(255, 0, 2)), '11111100', "255, 0, 2 ok";
is bit_bin(bit_clr(255, 0, 3)), '11111000', "255, 0, 3 ok";
is bit_bin(bit_clr(255, 0, 4)), '11110000', "255, 0, 4 ok";

is bit_bin(bit_clr(255, 3, 1)), '11110111', "255, 3, 1 ok";
is bit_bin(bit_clr(255, 3, 2)), '11100111', "255, 3, 2 ok";
is bit_bin(bit_clr(255, 3, 3)), '11000111', "255, 3, 3 ok";
is bit_bin(bit_clr(255, 7, 1)), '1111111', "255, 7, 1 ok";
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