Motorola MVME2600 Series Reference Manual page 11

Test SRAM................................................................................................ 3-52
Power-Up Reset Status Register 1 ............................................................ 3-53
Power-Up Reset Status Register 2 ............................................................ 3-53
External Register Set................................................................................. 3-54
Software Considerations.......................................................................................... 3-55
Parity Checking on the PowerPC Bus .............................................................. 3-55
Programming ROM/Flash Devices .................................................................. 3-55
Writing to the Control Registers....................................................................... 3-55
Sizing DRAM................................................................................................... 3-56
ECC Codes .............................................................................................................. 3-59
Data Paths ................................................................................................................ 3-61
CHAPTER 4 Universe (VMEbus to PCI) Chip
General Information .................................................................................................. 4-1
Introduction ........................................................................................................ 4-1
Product Overview - Features .............................................................................. 4-1
Functional Description .............................................................................................. 4-2
Architectural Overview ...................................................................................... 4-2
VMEbus Interface ....................................................................................... 4-4
PCI Bus Interface ........................................................................................ 4-5
Interrupter and Interrupt Handler ................................................................ 4-6
DMA Controller .......................................................................................... 4-7
Registers - Universe Control and Status Registers (UCSR)...................................... 4-7
Universe Register Map ....................................................................................... 4-8
PCI Reset Problems Associated with the Initial Version of the Universe Chip ...... 4-14
Problem Description......................................................................................... 4-14
Examples .......................................................................................................... 4-16
Example 1: MVME2600 Series Board Exhibits Problem......................... 4-16
Example 2: MVME3600 Series Board Acts Differently .......................... 4-18
Example 3: Universe Chip is Checked at Tundra ..................................... 4-20
CHAPTER 5 Programming Details
Introduction ............................................................................................................... 5-1
PCI Arbitration .......................................................................................................... 5-1
Interrupt Handling ..................................................................................................... 5-2
RavenMPIC ........................................................................................................ 5-3
8259 Interrupts ................................................................................................... 5-4
ISA DMA Channels................................................................................................... 5-7
Exceptions ................................................................................................................. 5-8
xii