Motorola MVME162 Manuale Utente
Board Level Hardware Description
1-18
MVME162 Embedded Controller Installation Guide
1
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.
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 5-nibble
number assigned to the board (i.e., every MVME162 has a different value for
XXXXX).
Address. The address is $08003E2XXXXX where XXXXX is the unique 5-nibble
number assigned to the board (i.e., every MVME162 has a different value for
XXXXX).
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.
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.
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.
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.
the 82596CA user’s guide for detailed programming information.
Optional SCSI Interface
The MVME162 may provide for mass storage subsystems through the
industry-standard SCSI bus. These subsystems may include hard and floppy
disk drives, streaming tape drives, and other mass storage devices. The SCSI
interface is implemented using the NCR 53C710 SCSI I/O controller.
industry-standard SCSI bus. These subsystems may include hard and floppy
disk drives, streaming tape drives, and other mass storage devices. The SCSI
interface is implemented using the NCR 53C710 SCSI I/O controller.
Support functions for the 53C710 are provided by the MCchip ASIC. Refer to
the 53C710 user’s guide for detailed programming information.
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.
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.