Chapter 4 Command Operation |
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Some Example Single Commands | Page 4 - 17 |
6.Read the Hardware Status Port at address EE10H. Since the ENT bit of the Status Port toggles between 0 and 1 with each Single Command Channel Attention issue, the value returned could be 0202H or 0203H depending on the previous value. We'll assume this is the first command after a reset; the initial value of the ENT bit is 0. The adapter is ready if the Status Port reads 0202H.
7.To execute the command, write a 0 to the Channel Attention Port.
8.When the command has completed, the Status Block will be written to memory and an interrupt generated by the RF3880 adapter. Read the Flags byte of the Status Block to determine if there are errors, or retries associated with the command.
Figure 17 Single Command Structure in memory
User’s Guide | 21020285 D |
