Decimal numbers, Hexadecimal numbers, Binary numbers – Zilog ZUSBOPTS User Manual
Page 250: Octal numbers, D the
Expressions
UM017105-0511
222
Zilog Developer Studio II – ZNEO™
User Manual
# LOW (X) ; 8 bits of X starting at bit 0 = 56H
# LOW16 (X) ; 16 bits of X starting at bit 0 = 3456H
Decimal Numbers
Decimal numbers are signed 32-bit integers consisting of the characters
0
–
9
inclusive
between
-2147483648
and
2147483647
. Positive numbers are indicated by the absence
of a sign. Negative numbers are indicated by a minus sign (
-
) preceding the number.
Underscores (_) can be inserted between digits to improve readability. For example:
1234 ; decimal
-1234 ; negative decimal
1_000_000; decimal number with underscores
_123_; NOT an integer but a name. Underscore can be neither
first nor last character.
Hexadecimal Numbers
Hexadecimal numbers are signed 32-bit integers ending with the
h
or
H
suffix or starting
with a
%
character and consisting of the characters
0
–
9
and
A
–
F
. A hexadecimal number
can have 1 to 8 characters. Positive numbers are indicated by the absence of a sign. Nega-
tive numbers are indicated by a minus sign (
-
) preceding the number. Underscores ( _ ) can
be inserted between hexadecimal digits to improve readability. For example:
ABCDEFFFH ; hexadecimal
%ABCDEFFF ; hexadecimal
-0FFFFh ; negative hexadecimal
ABCD_EFFFH; hexadecimal number with underscore
ADC0D_H; NOT a hexadecimal number but a name; hexadecimal digit
must follow underscore
Binary Numbers
Binary numbers are signed 32-bit integers ending with the character
b
or
B
and consisting
of the characters
0
and
1
. A binary number can have 32 characters. Positive numbers are
indicated by the absence of a sign. Negative numbers are indicated by a minus sign (
-
)
preceding the number. Underscores ( _ ) can be inserted between binary digits to improve
readability. For example:
-0101b ; negative binary number
0010_1100_1010_1111B; binary number with underscores
Octal Numbers
Octal numbers are signed 32-bit integers ending with the character
o
or
O
, and consisting
of the characters
0
–
7
. An octal number can have 1 to 11 characters. Positive numbers are