OVERVIEW OF NUMERIC PROCESSING
__
INCREASING
SIGNIFICANCE
WORD INTEGER
lSi
MAGNITUDE
I
15
0
(TWO'S
COMPLEMENT)
SHORT INTEGER
I I
MAGNITUDE
(TWO'S
L . ..1."--
__________
...... COMPLEMENT)
31
II
I
(TWO'S
LONG INTEGER
LS..I"--
__
"--
_______
M_A_G_N_IT_U_D_E
_________
-.I
COMPLEMENT)
U 0
MAGNITUDE
PACKED
DECIMAL
d17 d
'
6 d
'5
d
'
4 d
'3
d
'2
d
11
d10 d g
dB
d
7
d6 d
5
d
4
d
3
d
2
d
,
dO
79
72
SHORT REAL
LONG REAL S
63
BIASED
EXPONENT
SIGNIFICAND
o
1 !
TEMPORARY REAL
LIS..lI"--
__
__
_________
S_IG_N_1_F_IC_A_N_D
________
79
0
NOTES:
5 Sign bit (0 = positive, 1 negative)
dn Decimal digit (two
per
byte)
X Bits have
no
significance;
80287
Ignores when loading, zeros when storing.
• Position of implicit binary point
1 Integer bit of signi1icand: stored
in
temporary real, implicit (always 1)
in
short and long real
Exponent Bias (normalized values):
Short
Real: .127 (7FH)
Long Real: 1023 (3FFH)
Temporary
Real:.
16383
(3FFFH)
Figure 1-9. Data Formats
1-16
G30108
To Next Page
Loading...
