Figure 610. mcs3:0 active ranges, Table 65. mcs block size and start address restri, Figure 6-10). the base addr – Intel 80C188XL User Manual
Page 169: Table 6-5 lis
CHIP-SELECT UNIT
6-14
Figure 6-10. MCS3:0 Active Ranges
Table 6-5. MCS Block Size and Start Address Restrictions
MPCS Block Size Bits
Block Size
(Kbytes)
MMCS Start Address
Restrictions
M6
M5
M4
M3
M2
M1
M0
0
0
0
0
0
0
1
8
None
0
0
0
0
0
1
X
16
U13 must be zero.
0
0
0
0
1
X
X
32
U14:13 must be zero.
0
0
0
1
X
X
X
64
U15:13 must be zero.
0
0
1
X
X
X
X
128
U16:13 must be zero.
0
1
X
X
X
X
X
256
U17:13 must be zero.
1
X
X
X
X
X
X
512
U18:13 must be zero.
NOTE: If U19 is one, will overlap UCS.
X= don’t care, but should be 0 for future compatibility.
MCS3 Active Range
MCS2 Active Range
MCS1 Active Range
MCS0 Active Range
Base + (Block Size-1)
Base + (3/4 Block Size-1)
Base + (1/2 Block Size-1)
Base + (1/4 Block Size-1)
Base + 3/4 Block Size
Base + 1/2 Block Size
Base + 1/4 Block Size
Memory Map
MCS Base
(Defined by U19:13)
Block Size is
defined by M6:0
Starting Address
Ending Address
A1136-0C