Refer to Table C-1 for Powers of 2

With n bits in integer two’s complement format, you can count:

unsigned from 0 to (one less than 2ⁿ)

signed from -2^n-1 to (one less than 2^n-1)

Refer to Table C-2 for ISO 8859

Characters 0x0 to 0x1F are the C0 (control) characters, defined in ISO/IEC 6429:1992

Characters 0x20 to 0x7E are the G0 graphics characters of the 7-bit code set defined in ISO/IEC 646-1991(E)—essentially the 7-bit ASCII characters.

Characters 0x80 to 0x9F are the C1 (control) characters, defined in ISO/IEC 6429:1992

The unshaded characters comprise the Latin-1 code set defined in ISO/IEC 8859-1:1987 though the symbols “Φ“ and “Φ“ (0xDE and 0xFE) are approximations to the capital and small Icelandic letter “thorn.” The actual letters are too weird to be in character sets anywhere outside a 12-mile radius of Reykjavík.

Figure C-1. Powers-of-Two from 2¹ to 2⁶⁴

Figure C-2. ISO 8859 8-Bit Latin-1 Character Set and Control Characters