45
1st MB Memory Address Map
Memory address
Description
00000-9FFFF System
memory
A0000-BFFFF VGA
buffer
F0000-FFFFF System
BIOS
1000000- Extend
BIOS
IRQ Mapping Table
IRQ0 System Timer
IRQ8 RTC clock
IRQ1 Keyboard
IRQ9 USB2.0
IRQ2 Available
IRQ10 LAN
IRQ3 COM2
IRQ11 AUDIO/SMBus Cntrlr
IRQ4 COM1
IRQ12 PS/2 mouse
IRQ5 Available
IRQ13 FPU
IRQ6 FDC
IRQ14 Primary IDE
IRQ7 Available
IRQ15 Secondary IDE
DMA Channel Assignments
Channel Function
0 Available
1 Available
2
Floppy disk (8-bit transfer )
3 Available
4
Cascade for DMA controller 1
5 Available
6 Available
7 Available
Содержание PSB Form Factor Board SAGP-845EV
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