Intel 386 User Manual page 440

Example 1
This example establishes a single 32-Kbyte address block starting at 1340000H (a 32-Kbyte
boundary). In this example, the 15-bit channel address is the starting address of the channel's ac-
tive address block (because there are no 1's in the channel mask where there are 1's in the channel
address)
.
15-bit Channel Address
15-bit Channel Mask
Channel Active Address
Because the least-significant 0 in the channel's mask is in bit position 5, this channel's active ad-
5
dress block size is 2 = 32 Kbytes. Because there are no 1's to the left of the right-most 0 in the
channel's mask, the block is not repeated.
15
0 1 0 0 1 1 0 1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
25
0 1 0 0 1 1 0 1 0 0 0 X X X X
1347FFFH
Active
1340000H
CHIP-SELECT UNIT
1
X X X X X X X X X X X
0
14-5