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Sundance Technology ST201 PRELIMINARY draft 2
INTERRUPTLINE
Class....................PCI Configuration Registers, Configuration
Base Address ......PCI device configuration header start
Address Offset.....0x3c
Access Mode.......Read/Write
Width ...................8 bits
BIT BIT NAME BIT DESCRIPTION
7..0 InterruptLine This register is written by the system to communicate to the device
driver which interrupt level is being used for the device. This allows the
driver to use the appropriate interrupt vector for its ISR. For 80x86 sys-
tems, the value in InterruptLine correspond to the IRQ numbers (0
through 15) of the standard dual 8259 configuration, and the value 255
correspond to “disabled”.