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4-26 System Board
Resources
The system memory map, I/O addresses, and DMA settings are given in the
following sections. System interrupt settings, parallel interrupt settings, and
serial interrupt settings are included in Section 2, “System Configuration.”
Memory Map
The system memory map is shown in the following table.
System Memory Map
Memory Space
Size
Function
100000-18000000
383 MB
Extended memory
FC000-FFFFF
16 KB
Boot block
FA000-FBFFF
8 KB
ESCD (Plug and Play Configuration and DMI)
F9000-F9FFF
4 KB
Reserved for BIOS
F8000-F8FFF
4 KB
OEM logo or Scan User Flash)
E8000-E7FFF
64 KB
POST BIOS
E0000-E7FFF
32 KB
POST BIOS (currently available as UMB)
C8000-D7FFF
96 KB
Available HI DOS memory (open to ISA and PCI bus)
A0000-C7FFF
160 KB
Video memory and BIOS
9FC00-9FFFF
1 KB
Extended BIOS data (movable by memory manager software)
80000-9FBFF
127 KB
Extended conventional memory
00000-7FFFF
512 KB
Conventional memory
I/O Addresses
The processor communicates with I/O devices by I/O mapping. The
hexadecimal (hex) addresses of I/O devices are listed in the following table.
Note:
In Plug and Play systems, these addresses are
typical but may vary by configuration.
I/O Address Map
Address (Hex)
I/O Device Name
0000-000F
PIIX4 - DMA controller 1 (channel 0-3)
0020-0021
PIIX4 - interrupt controller 1
002E-002F
Super I/O controller configuration registers
0040-0043
PIIX4 - counter/timer 1
0048-004B
PIIX4 - counter/timer 2
Содержание POWERMATE 8100 Series
Страница 17: ...1 System Overview Configurations Features Components ...
Страница 131: ...4 System Board Connectors Jumpers and Sockets Components Pin Assignments Resources ...
Страница 183: ...6 Illustrated Parts Breakdown Parts and Options Field Replaceable Unit FRU List Illustrated Parts Breakdown IPB ...
Страница 189: ...7 Preventive Maintenance System Cleaning Keyboard Cleaning Mouse Cleaning ...
Страница 193: ...8 Troubleshooting Checklist Diagnostics ...
Страница 204: ...9 NEC CSD Information Services Service Telephone Numbers Technical Support Product Information FaxFlash Service ...