Motorola MVME2400 Series Programmer's Reference Manual page 260

System Memory Controller (SMC)
3
3-80
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9. Determine the size for each block that is present. (Do not actually
program the Hawk's size bits at this point. You use this information
to program them later.) Each block's size can be determined using
the following algorithm:
a. Calculate the number of rows in each device using SPD byte 3.
If the number of rows is ROWS and the value in SPD byte 3 is R,
R
then ROWS=2 .
b. Calculate the number of columns in each device using SPD byte
4. If the number of columns is COLUMNS and the value in SPD
byte 4 is C, then COLUMNS=2
c. Calculate the total number of addresses within each device. If the
total number of addresses in a device is A, then A=ROWS X
COLUMNS
d. Calculate the total number of locations in the block using the
results of step 3 and SPD byte 17. If the total number of locations
in the block is L, and the value in byte 17 is 4, then:
L = A x 4
or
R C
L = 2 X 2 X 4
(Note that the Hawk only works if byte 17 is 4).
e. Obtain the primary device width from SPD byte 13.
f. Determine the size bits based on the results of steps d and e using
the following table:
C
.
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