updated documentation, explained all similarities >3

strings/0FDAA2

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+part of floating point constants pi/2 and one of the sine calculation coefficients
+
+In the opriginal ROMs this sequence occurs within two floating point constants, one is a very common: PI/2. Mathematical fact, not a human creation - not copyrightable.

strings/11D029EF8D11D0AD

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+$D011 + AND #$EF + STA $D011 + LDA (address not included in similarity)
+
+Simple set of instructions manipulating bits in a documented hardware register. Trivial - not copyrightable.

strings/20D0F790

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+JSR $F7D0 + BCC (offset not included in similarity)
+
+Jump to a subroutine + decision based on result (Carry flag) - trivial, not copyrightable.

strings/6020D0F7

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+RTS + JSR $F7D0
+
+End of a routine + a single instruction. Trivial - not copyrightable.