As character names:

U+009F <control> character (&#x009F;)

As raw characters:

Ÿ

As a string of HTML entities:

&#x009f;

Decoder output:

Byte number 1 is decimal 194, hex 0xC2, octal \302, binary 11000010
This is the first byte of a 2 byte sequence.

Byte number 2 is decimal 159, hex 0x9F, octal \237, binary 10011111
This is continuation byte 1, expecting 0 more.

U+009F	<control>
	= APPLICATION PROGRAM COMMAND