SOYO SY-5SSM User's Manual & Technical Reference page 64

BIOS Setup Utility
3-5.3 PNP/PCI Configuration Setup
PNP/PCI Setup Setting
Under this item the user can assign an IRQ to a PCI slot. However, there
under some conditions the IRQ will not be assigned as selected under this
item:
1. IRQs 0, 1, 2, 6, 8, 13 can NOT be assigned, because they are fixed.
2. IRQs 5, 9, 10, 11 are available
3. IRQs 3,4,7,12,14 and 15 will only be assigned if they are free. See the
table below on how to free them:
How to set the BIOS to release the IRQ to the PnP Interrupt pool:
Interrupt
Line
PnP / PCI configuration Integrated Peripherals
IRQ 15 IRQ 15: PCI / ISA PnP On-Chip Secondary PCI IDE: disabled
IRQ 14 IRQ 14: PCI / ISA PnP On-Chip Primary PCI IDE:
IRQ 12 IRQ 12: PCI / ISA PnP
IRQ 7 IRQ 7:
IRQ 4 IRQ 4:
IRQ 3 IRQ 3:
4. Your OS may reassign another interrupt to a PCI slot after BIOS passes
control to the OS, especially if you use Windows 95, 98 or NT.
Slot 1/2/3/4
Use IRQ NO.
Description
PCI / ISA PnP Onboard parallel port: disabled
PCI / ISA PnP Onboard Serial port 1: disabled
PCI / ISA PnP Onboard Serial port 2: disabled
Auto
SY-5SSM & SY-5SSM/5 V1.1
Interrupt 12 will be released by the PnP
BIOS automatically if the PS/2 Mouse
Port is not used.
60
Note
disabled
Default