IBM PSB Form Factor Board SAGP-845EV - Manual (Page 45)

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