Delta DVP-ES2 - Manual (Page 206)

D V P - E S 2 / E X 2 / S S 2 / S A2 / S X 2 / S E O p e r a t i o n M a n u a l - P r o g r a m m i n g
3 - 9 0
X0
CMP D0 D2 M0
M0
SUB D0 D2 D4
M2
SUB D2 D0 D4
M1
Detailed explanations on negative value and its absolute value
1. MSB = 0 indicates the value is positive while MSB = 1 indicates the value is negative.
2. NEG instruction can be applied to convert a negative value into its absolute value.
0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
(D0=2)
(D0=1)
(D0=0)
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
(D0=-1)
0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
(D0)+1=1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
(D0=-2)
0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
(D0)+1=2
1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1
(D0=-3)
0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0
(D0)+1=3
1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 0
(D0=-4)
0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
(D0)+1=4
1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1
(D0=-5)
0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0
(D0)+1=5
1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1
(D0=-32,765)
1 1 1 1 1 1 1 1 0 1 1 1 1 0 1 1
(D0)+1=32,765
1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
(D0=-32,766)
1 1 1 0 1 1 1 1 0 1 1 1 1 1 1 1
(D0)+1=32,766
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
(D0=-32,767)
1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1
(D0)+1=32,767
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
(D0=-32,768) (D0)+1=-32,768
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Max. absolute value is 32,767