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ASUS M3A78-EM 1-23
IRQ assignments for this motherboard
A B C D E F G H I
PCIEX1 Slot shared – – – – – – – –
PCIEX16 Slot – – shared – – – – – –
Onboard USB1.1 Controller 1 shared – – – – – – – –
Onboard USB1.1 Controller 2 – – – – – – – – –
Onboard USB1.1 Controller 3 – – shared – – – – – –
Onboard USB1.1 Controller 4 – – – – – – – – –
Onboard USB1.1 Controller 5 – – shared – – – – – –
Onboard USB2.0 Controller 1 – – – – – – – – –
Onboard USB2.0 Controller 2 – – – – – – – – –
Onboard ATI RS780G AZALIA – – shared – – – – – –
Onboard IDE PORT shared – – – – – – – –
Onboard HD Audio shared – – – – – – – –
Onboard LAN – – shared – – – – – –
Onboard VGA – – shared – – – – – –
Onchip SATA – – – – – – shared – –
JMB1394 – shared – – – – – – –
PCI Card1 – – – – shared – – – –
PCI Card2 – – – – – shared – – –
When using PCI cards on shared slots, ensure that the drivers support “Share
IRQ” or that the cards do not need IRQ assignments; otherwise, conicts will
arise between the two PCI groups, making the system unstable and the card
inoperable.