Operating Instructions
2-17
2
PCI Arbitration
There are 6 potential PCI bus masters on the MVME1603/MVME1604
single-board computer:
❏
MPC105 (PCI/MPU bus bridge and memory controller)
❏
IBC (PCI/ISA bus bridge controller)
❏
DECchip 21040 Ethernet controller
❏
53C825 (or 53C810) SCSI controller
❏
VME2PCI ASIC (PCI/VMEchip2 interface ASIC
❏
PMC (PCI mezzanine card) slot
The IBC supplies the PCI arbitration support for these six devices. The
IBC supports flexible arbitration modes of fixed priority, rotating priority,
and mixed priority.
The IBC registers that control the arbitration mode are the PCI Arbiter
Priority Control (PAPC) Register and the PCI Arbiter Priority Control
Extension (ARBPRIX) Register. The PAPC register and the ARBPRIX
register default to 04 (hex) and 00 (hex) respectively. This default
configuration puts the CPU (MPC105) at the highest priority level. Refer
to the S82378ZB Reference Manual for programming information.
The following figure shows the arbitration configuration diagram of the
IBC. Additional details on PCI arbitration can be found in the
Programmer’s Reference Guide (part number V1600-1A/PG).
Summary of Contents for MVME1603
Page 1: ...MVME1603 MVME1604 Single Board Computer Installation and Use V1600 1A IH4 ...
Page 14: ...xiv ...
Page 156: ...Using the Debugger 5 8 5 ...
Page 176: ...ENV Set Environment 6 20 6 ...
Page 190: ...EMC Compliance B 4 B ...
Page 200: ...Proper Grounding C 10 C ...
Page 222: ......