Artesyn MVME5100, Programmer'S Reference Manual, Page: 144 / 318

Hawk PCI Host Bridge & Multi-Processor Interrupt Controller
MVME5100 Single Board Computer Programmer’s Reference (6806800H17B )
144
2.5.1.10 PCI Interrupt Acknowledge Register
The PCI Interrupt Acknowledge Register (PIACK) is a read only register that is used to initiate a
single PCI Interrupt Acknowledge cycle. Any single byte or combination of bytes may be read
from, and the actual byte enable pattern used during the read will be passed on to the PCI bus.
Upon completion of the PCI interrupt acknowledge cycle, the PHB will present the resulting
vector information obtained from the PCI bus as read data.
2.5.1.11 PPC Slave Address (0,1 and 2) Registers
The PPC Slave Address Registers (XSADD0, XSADD1, and XSADD2) contains address
information associated with the mapping of PPC memory space to PCI memory I/O space. The
fields within the XSADDx registers are defined as follows:
START
Start Address. This field determines the start address of a particular memory area on the PPC
bus which will be used to access PCI bus resources. The value of this field will be compared with
the upper 16 bits of the incoming PPC address.
END
Table 2-43 PCI Interrupt Acknowledge Register
Address $FEFF0030
Bit
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Name PIACK
Operation R
Reset $00000000
Table 2-44 PCI Interrupt Acknowledge Register
Address
XSADD0 - $FEFF0040
XSADD1 - $FEFF0048
XSADD2 - $FEFF0050
Bit
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Name XSADDx
START END
Operation R/W R/W
Reset $0000 $0000