Ibm PSB Form Factor Board SAGP-845EV Manuel d'utilisateur télécharger pdf (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

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