User’s Guide 21020285 D
Chapter 7 Board-control Commands
Extended Board Statistics (16H) Page 7 - 41
Extended Board Statistics (16H)The RF3880 adapter keeps track of several types of board statistics. With the
Extended Board Statistics command you can retrieve the extended set of
statistics kept by the adapter. The statistics are valid only as long as power is
kept to the system. This command reports the statistics by recording them in
the area of system memory specified in the command Parameter Block; this
statistics structure is returned in addition to the normal Status Block.
You can clear the internal statistics table at any time by issuing the command
with the CLR bit of the Options field set. No data transfer occurs wh en the CLR
bit is set.
Command
Format
The Parameter Block format for the Extended Board Statistics command looks
like this:
Description of
Fields
Each of the fields of the Parameter Block are explained below:
Command Identifier
This field is used to identify the Status Block associated with a Parameter Block.
It must be a unique value.
Adapter ID
This field must be set to FFH.
Address Modifier
This is the value to be used by the adapter as an Address Modifier when writing
extended statistics to memory. This field is not used when the CLR bit is set.
VME Memory Address
This is the system memory address at which you wi sh to have the adap ter place
the Extended Statistics Data Structure. This field is not used when the CLR bit
is set.
Address
Offset Byte Memory Address
Offset + 0Offset + 1Offset + 2Offset + 3
00H Command Identifier
04H Reserved Addr. Mod. Adapter ID = FFH
08H VME Memory Address
0CH Reserved
10H Command = 16H Options Reserved
14H Reserved
18H Reserved
Table 100: Extended Board Statistics Parameter Block