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Board Level Hardware Description
VMEbus has an undefined latency period, buffer overrun may occur if the DMA is programmed to access the VMEbus. Therefore, the 82596CA should not be programmed to access the VMEbus.
Every MVME162 that has the Ethernet interface is assigned an Ethernet Station Address. The address is $08003E2XXXXX where XXXXX is the unique
Each board has an Ethernet Station Address displayed on a label attached to the VMEbus P2 connector. In addition, the six bytes including the Ethernet address are stored in the configuration area of the BBRAM. That is, 08003E2XXXXX is stored in the BBRAM. At an address of $FFFC1F2C, the upper four bytes (08003E2X) can be read. At an address of $FFFC1F30, the lower two bytes (XXXX) can be read. The MVME162 debugger has the capability to retrieve or set the Ethernet address.
If the data in the BBRAM is lost, the user should use the number on the VMEbus P2 connector label to restore it.
The Ethernet transceiver interface is located on the MVME162 main board, and the industry DB15 standard connector is located on the MVME712X transition board.
Support functions for the 82596CA are provided by the MCchip ASIC. Refer to the 82596CA user’s guide for detailed programming information.
Optional SCSI Interface
The MVME162 may provide for mass storage subsystems through the
Support functions for the 53C710 are provided by the MCchip ASIC. Refer to the 53C710 user’s guide for detailed programming information.
SCSI Termination
The system configurer must ensure that the SCSI bus is properly terminated at both ends. On the MVME162, sockets are provided for the terminators on the P2 adapter board or the LCP2 adapter board. If the SCSI bus ends at the adapter board, then termination resistors must be installed on the adapter board. +5V power to the SCSI bus TERM power line and termination resistors is provided through a fuse located on the adapter board.
MVME162 Embedded Controller Installation Guide |
