Pci/Pmc Expansion Capability; Pci Configuration Space; Table 2-3. Idsel Mapping For Pci Devices - Motorola MVME2100 Programmer's Reference Manual

PCI/PMC Expansion Capability

The MVME2100 provides additional PCI/PMC capability through the use
of a 114-pin Mictor connector that is compatible with other VMEbus
processor boards. By using existing PMCspan carrier boards up to four
additional PMC boards can be used.
The PCI interrupts signals INTA#, INTB#, INTC#, and INTD# for these
PCI/PMC expansion board(s) are separately connected to the MPC8240
serial Interrupt Controller.

PCI Configuration Space

When using Address Map A, the PCI configuration registers are accessed by
an indirect method in accordance to the PCI Local Bus Specification. The
register address is written to CONFIG_ADDR at 0x8000 0CF8. Then the data
is accessed at CONFIG_DAT at addresses 0x8000 0CFC - 0x8000 0CFF.
When using Address map B, the PCI configuration registers are accessed in a
similar manner except CONFIG_ADDR is located at any word-aligned
address in the range 0xFEC0 0000 through 0xFEDF FFFF and CONFIG_DAT
is located at any word-aligned address in the range 0xFEE0 0000 through
0xFEEF FFFF.
Each PCI device has an associated address line connected via a resistor to its
IDSEL pin for Configuration Space accesses. The table below shows the
IDSEL assignments for the PCI devices on the MVME2100.

Table 2-3. IDSEL Mapping for PCI Devices

Device
Number
Field
0b0_1101
0b0_1110
0b1_0000
0b1_0001
0b1_0010
0b1_0011
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PCI Address
Line
AD13 Universe II PCI-VMEbus
AD14 DEC21143 Controller
AD16 PMC/PC-MIP Type I Slot 0
AD17 PC-MIP Type I Slot 1
AD18 PC-MIP Type II Slot 0
AD19 PC-MIP Type II Slot 1
Input/Output Functionality
Physical PCI Device
2
2-5