User`s manual

.NETCTRL

5-45

Field descriptions:

Controller LUN Logical Unit Number (LUN) of controller to use

Device LUN Logical Unit Number of device to use

Status Word This status word reßects the result of the

operation. It is zero if the command completed

without errors. Refer to Appendix H for

meanings of returned error codes.

Command

IdentiÞer

The command operation type. The command

types (identiÞers) are as follows:

0 Initialize device/channel/node

1 Get hardware (Ethernet) address

(network node)

2 Transmit (put) data packet

3 Receive (get) data packet

4 Flush receiver and receive buffers

5 Reset device/channel/node

Rules on commands:

The initialization (type 0) of the

device/channel/node must always be

performed Þrst. If you have booted or initiated

some other network I/O command, the

initialization would already have been done.

The ßush receiver and receive buffer (type 4)

would be used if, for example, the current

receive data is not longer needed, or to provide a

known buffer state prior to initiating data

transfers.

The reset device/channel/node (type 5) would

be used if another operating system (node

driver) needs to be in control of the

device/channel/node. Basically, put the

device/channel/node to a known state.