TRICONEX 4101 Integrated circuit module

Although the VMIVME-5576 VMEbus Reflective Memory Board is software transparent on power-up, some registers are present to facilitate user information and interrupt generation.The Board ID Register allows the user to verify the presence of the Reflective Memory Board at the correct address. The VMIVME-5576 Board ID number is $18 HEX.A value from 0 to 255 can be read from this byte. The value read corresponds to the node ID jumper selected for the board.Fast mode transmits each data transfer once on the fiber-optic link. If the jumper J5 is installed, each transfer is sent twice on the fiber-optic link If the mask jumper J3 is installed and INT0 is enabled by software on the bus interrupt module, an interrupt will be generated each time a receive error is detected on the fiber-optic link.

Example Memory Configurations

 Node 0 is configured with 1 Mbyte of memory, Nodes 1 and 2 are configured with 512 K of memory, and Nodes 3 and 4 are configured with 256 K of memory. Because of the relative location of the memory, data written to address range X00000h to X7FFFFh by a processor in Node 0 will also be written into the corresponding address in Node 1. However, no data will be written into Nodes 2, 3, and 4 because there is no memory in that range in those nodes. Similarly, data written into address range X80000h to XBFFFFh in Node 2 will also be written into Nodes 0 and 3, but not Nodes 1 and 4.

Own-data (high if link intact) (Read/Write) 

 This bit indicates that the local node has received data back that had originated on the local node. It may be reset by writing this bit to a logic "zero". Once set by receiving its own node ID from the fiber-optic receiver, the bit remains set until cleared by the local VME side. BIT 3 - Bad-data (high if error occurred) (Read/Write) This bit indicates that a single transfer error has occurred. It does not depend on the mask jumper to be removed. In redundant transmission mode (3.2 Mbyts/sec), it indicates only that a transfer error occurred on one of the two transfers.

These two bits display status on the transmit FIFO on the local node. The current status of the transmit status is displayed.

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