Motorola MC68020 User Manual page 233

Address Mode
#<data >.L,([d ,B],I,d )
16 16
#<data >.([d ,B],I,d )
16 32
#<data >.([d ,B],I,d )
16 32
#<data >.W,([d ,B],I)
32
#<data >.L,([d ,B],I)
32
#<data >.W,([d ,B],I,d
32 16
#<data >.L,([d ,B],I,d )
32 16
#<data >.W,([d ,B],I,d
32 32
#<data >.L,([d ,B],I,d )
32 32
B = Base address; 0, An, PC, Xn, An + Xn. Form does not affect timing.
I = Index; 0, Xn
NOTE: Xn cannot be in B and I at the same time. Scaling and size of Xn do not affect timing.
8-18
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M68020 USER'S MANUAL
Best Case Cache Case
13(1/0/0) 19(1/0/0)
12(1/0/0) 17(1/0/0)
13(1/0/0) 19(1/0/0)
14(1/0/0) 19(1/0/0)
15(1/0/0) 21(1/0/0)
16(1/0/0) 21(1/0/0)
17(1/0/0) 23(1/0/0)
16(1/0/0) 21(1/0/0)
17(1/0/0) 23(1/0/0)
Worst Case
23(1/3/0)
22(1/3/0)
24(1/3/0)
22(1/3/0)
24(1/3/0)
24(1/3/0)
26(1/3/0)
24(1/3/0)
29(1/4/0)
MOTOROLA