User manual

97 PCM-9588 User Manual
Appendix E System Assignments
E.2 1st MB Memory Map
E.3 DMA Channel Assignments
E.4 Interrupt assignments
Table E.2: Table C.2: 1st MB memory map
Addr. Range (Hex) Device
F0000h – FFFFFh Upper BIOS Area (64kB)
E0000h – EFFFFh Lower BIOS Area (64kB) 16kB x 41
C0000h – DFFFFh Expansion Card BIOS and Buffer Area (128kB) 16kB x8
A0000h – BFFFFh Standard PCI/ISA Video Memory (SMM Memory) 128kB
00000h – 9FFFFh DOS Area
* Refer to Intel 852GM/852GMV Chipset GMCG Datasheet
Table E.3: DMA channel assignments
Channel Function
0 Available
1 Reserved (audio)
2 Floppy disk (8-bit transfer)
3 Available (parallel port)
4 Cascade for DMA controller 1
5 Available
6 Available
7 Available
* Audio DMA select 1, 3, or 5
** Parallel port DMA select 1 (LPT2) or 3 (LPT1)
Table E.4: Interrupt assignments
Interrupt# Interrupt source
IRQ0 Interval timer
IRQ1 Keyboard
IRQ2 Interrupt from controller 2 (cascade)
IRQ3 COM1
IRQ4 COM2
IRQ5 COM3
IRQ6 Reserved
IRQ7 AUDIO/LPT
IRQ8 RTC
IRQ9 COM5
IRQ10 COM4
IRQ11 COM6
IRQ12 Reserved
IRQ13 Math Coprocessor
IRQ14 Fixed Disk
IRQ15 Reserved