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Hardware Information
8.1
Hardware Address Table
8
8-2
There are two kinds of address area:
Memory address area
I/O address area.
Different read/write signals (I/O WR, I/O RD, MEMR, MEMW) are used to
reference these areas. The following tables provide you with an overview of
the address areas used.
Table 8-1
Assignment of the 4 Gbyte Memory Address Area.
Memory
Adresses
0000 0000 to
640 KB system memory on the motherboard
0009 FFFF
System data, operating system, drivers, and programs
000A 0000 to
128 KB refresh memory for monitor interface module. Only part or
000B FFFF
the whole of the memory area is used depending on the interface
module and operating mode.
000C 0000 to
Not assigned
000C BFFF
000C C000 to
Reserved for the MPI
000C CFFF
000C D000 to
Not assigned
000C FFFF
000D 0000 to
Not assigned or reserved for PCMCIA, when the PCMCIA driver
000D FFFF
is loaded.
000E 0000 to
128 KB max. ROM on the motherboard
000F FFFF
(VGA BIOS, Power Management)
0010 0000 to
3 MB DRAM system memory in the basic configuration
003F FFFF
(virtual diskette or "protected mode" operating systems)
0040 0000 to
32 MB DRAM system memory expansion
01FF FFFF
(virtual diskette or "protected mode" operating systems)
0200 0000 to
Reserved
FFDF FFFF
FFFE 0000 to
128 KB shadow of the area 000E 0000 to 000F FFFF
FFFF FFFF
Table 8-2
I/O Address Assignments
I/O Addresses
0000 H-001F H
DMA controller 1 (8237)
0020 H-0021 H
Interrupt controller 1 (master/8259)
0022 H-0023 H
Not used
0024 H-0025 H
Configuration index
Memory Address Assignment
Chip/Module
PG 720 Programming Device
C79000-G7076-C720-02
Hardware
Interrupt Used
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