Control FSM for K = (C + D) * (C - D)
ALU
0
1
ALE
BLE
BSEL
ASEL
A
B
X1=C
X2=D
F
ASEL BSEL ALE BLE F
Control FSM
current outputs
state
s1
1 1 1 1 -
s2
0 0 1 0 A+B
s3
0 0 ? ? A?B
Y
Where do we store C, D, C+D?
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