Intel NetStructure MPCBL0001 - Manual (Page 76)

76 Technical Product Specification
Order #273817
Intel NetStructure
®
MPCBL0001 High Performance Single Board Computer
Contents
3.16.1.2 Configuration of Buffering/Filtering
Configuration of the Serial Buffering and Filtering features is accomplished with Intel-specific
(OEM) IPMI commands: Set Serial Buffer Configuration and Get Serial Buffer Configuration. The
Set Serial Buffer Configuration command can enable/disable both filtering and buffering.
The lower seven bits of the first byte of the Set Serial Buffer Configuration command are reserved
and should be set to 0. If the most significant bit (80h) is set, then the buffer will be cleared when
the parameters are set.
The second data byte defines which parameters will change and what they will change to. Bits 4
and 5 are mask bits that enable the usage of bits 1 and 0 respectively. If 00h is the value of this byte,
then no changes in configuration will happen. Bit 0 is used to enable/disable filtering and bit 1 is
for enabling/disabling buffering. A 00h value can be used when clearing the buffer without
changing any parameters.
3.16.1.3 Reading Buffered Data
The buffer has the capability to hold approximately 2048 characters. The buffer is circular so that
when it fills, it will automatically start overwriting the oldest data first. This provides a “snapshot”
of the last 2048 characters written to the COM2 port.
Table 40. Set Serial Buffer Configuration Command: Net Function=30h, Command=32h
Byte Data Field
Request Data 1
[7] – 1b = Clear buffer
[6] – Reserved
[5] – 1b = Use value in [1] to enable/disable buffering
0b = Ignore setting in [1]
[4] – 1b = Use value in [0] to enable/disable filtering
0b = Ignore setting in [0]
[3:2] – Reserved
[1] –1b = Enable buffering if [5] == 1b
0b = Disable buffering if [5] == 1b
[0] –1b = Enable filtering if [4] == 1b
0b = Disable filtering if [4] == 1b
Response Data 1
Completion code
Table 41. Get Serial Buffer Configuration Command: NetFn=30h, Cmd=31h
Byte Data Field
Response Data
1 Completion code
2
[7:2] – Reserved
[1] –1b = Buffering is enabled
0b = Buffering is disabled
[0] –1b = Filtering is enabled
0b = Filtering is disabled