82C836 Datasheet, PDF (109/205 Pages) List of Unclassifed Manufacturers – Single-Chip 386sx AT

Address Maps
Table 9-4. Index Registers
ICR Index
01H
40H
41H
42H
43H
44H
45H
46H
47H
48H
49H
4AH
4BH
4CH
4DH
4EH
4FH
60H
61H
62H
63H
64H
Read/Write
R/W
R/O
R/W
----
----
R/W
R/O
R/W
----
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
I/O Address Maps s
Description
DMA Wait-State Control Register
Version Register
Channel Environment Register
(Reserved) Do Not Write to This Register
(Reserved) Do Not Write to This Register
Peripheral Control Register
Miscellaneous Status Register
Power Management Register
(Reserved) Do Not Write to This Register
ROM Enable Register
RAM Write Protect Register
Shadow RAM Enable Register 1
Shadow RAM Enable Register 2
Shadow RAM Enable Register 3
DRAM Configuration Register
Extended Boundary Register
EMS Control Register
Laptop Features
Fast Video Control
Fast Video RAM Enable
High Performance Refresh
CAS Timing for DMA/Master
Table 9-5. Timer Counter Registers
I/O Address
0040H
0041H
0042H
0043H
Read/Write
R/W
R/W
R/W
W
Description
Timer 0 Count Load/Read
Timer 1 Count Load/Read
Timer 2 Count Load/Read
Timer Control Word
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