ncr/doc/Kiosks/TechnicalManuals/7401_Kiosk_Har... - Alsys Data

Chapter 5: Setup 5-7
Allocating Interrupts
On the 7401, limited control of interrupt allocation is provided through
the BIOS Setup Utility. Due to the nature of the PCI bus, the Plug and
Play subsystem allocates the interrupts of PCI devices using all
available interrupts.
To free IRQ15, it is necessary to disable the secondary IDE bus. To do
this, in the Advanced menu, choose Primary in the Local BUS IDE
adapter selection.
To free IRQs 4, 3, or 7, in the I/O Device Configuration selection, disable
COM A, COM B, or the Parallel port, respectively.
To finalize the freeing of interrupts and make unused interrupts
available for use by PCI devices, it is necessary to reset the
configuration data. This can be done in the Advanced menu.
To use ISA devices that require interrupts, it is necessary to reserve
those interrupts so that those interrupts are not allocated by the BIOS
to PCI devices. To do this, in the Advanced menu, choose Advanced
Chipset Control. Choose PCI/PNP IRQ Resource Exclusion, then set all
ISA interrupts to Reserved.
Restoring Factory Settings
To automatically reset all values to their default settings for the current
screen, press F9. The terminal will automatically load BIOS default
CMOS values for boot up.
To reset all BIOS settings to their default settings go to the Exit menu,
press F9, select either Save Changes & Exit or Save Changes, and press
Enter.
Refer to the “BIOS Default CMOS Values” section later in this chapter
for the pre‐installed Setup defaults.