Intel 386 - Manual (Page 439)

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
14-4
Figure 14-2. Determining a Channel’s Address Block Size
Any ones that are to the left of the right-most zero determine the number of blocks and the loca-
tions where the blocks are repeated. This is best illustrated by the following four examples. The
examples assume the channel is configured for memory addresses; however, the concepts dis-
cussed also apply to I/O-configured channels.
A2534-01
X X X X X X X X X X X X X 0 1
X X X X X X X X X X X X X X 0
X X X X X X X X X X X X 0 1 1
0 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
15 1
2 = 2 Kbyte
1
2 = 4 Kbyte
2
2 = 8 Kbyte
3
2 = 32768 Kbyte
15
2 = 65536 Kbyte
16
15-bit Channel Mask Block Size