The atomic type specifier signed-byte denotes the same type as is denoted by the type specifier integer; however, the list forms of these two type specifiers have different semantics.
Abbreviating.
(signed-byte{[s | *]})
| s | a positive integer. |
This denotes the set of integers that can be represented
in two’s-complement form in a byte of s bits. This is
equivalent to (integer -2^s-1 2^s-1-1). The type
signed-byte or the type (signed-byte *) is the same
as the type integer.