System resources, System memory map, I/o map – ADLINK cExpress-BT User Manual
Page 41
cExpress-BT
Page 41
6. System Resources
6.1. System Memory Map
Address Range (decimal)
Address Range (hex)
Size
Description
Start 128KB below 1MB
000E0000h-000FFFFFh
Low BIOS
Starts 20MB below 4GB
FEC00000h-FEC0040h
IO APIC
Start 19MB below 4GB
FED00000h-FED003FFh
HPET
Start 64 KB below 4GB
FFFF0000h-FFFFFFFFh
High BIOS
0K –1MB
1MB
DOS DRAM
6.2. I/O Map
Hex Range
Device
20h-21h, 24h-25h, 28h-29h, 2Ch-2Dh,
30h-31h, 34h-5h, 38h-39h, 3Ch-3Dh
8259 Master
40h-43h, 50h-53h
8254s
61h, 63h, 65h, 67h
NMI Controller
70h-77h RTC
80h-83h Port
80h
92h Init
Register
A0h-A1h, A4h-A5h, A8h-A9h, ACh-ADh,
B0h-B1h,B4h-B5h, B8h-B9h, BCh-BDh,
4D0h-4D1h
8259 Slave
3F8h-3FFh
PCU UART (COM1)
B2h-B3h
Active Power Management
E000
SMBus base address for SB.
500
GPIO base address for SB
400
PM (ACPI) base address for SB