Bitfields for AMD-645 PCI IRQ Edge/Level Select register:
Bit(s) Description )
7-4 reserved
3 PIRQA# is edge-sensitive rather than level-sensitive
2 PIRQB# is edge-sensitive
1 PIRQC# is edge-sensitive
0 PIRQD# is edge-sensitive
SeeAlso: #01011,#01023,#01025