Alert Standard Format (ASF) Specification

Alert Standard Format (ASF) Specification v2.0 DMTF Document DSP0136
DSP0136 23 April 2003 Page 75 of 94
8 1 8 1 8 1 1
Data1 A Data2 A PEC A P
Sub Command
Clear Boot Options
0001 0101
0 Version Number
0001 0000
0 [data dependent] 0
5.3 Discovery and Status Messages
5.3.1 Device Type Poll Message
The Device Type Poll message allows an SMBus master to further determine the characteristics
of an SMBus 2.0 device that responds to an ARP cycle with the ASF bit of its Interface byte set to
1. The device, currently either an ASF-sensor or an alert-sending device, returns its ASF
Function Bits:
Bit(s)
Meaning
7:5 Reserved for future assignment by this specification, set to 000b.
4 Set to 1b if the alert-sending device supports the ASF security extensions.
3 Set to 1b if the alert-sending device’s transport media is valid, or up. This bit is always 0b
for ASF-sensor devices.
2 Set to 1b if the alert-sending device has been configured with the information required to
send PET frames. This bit is always 0b for ASF-sensor devices.
1:0 ASF Device Type
, set to one of the following enumerated values:
11b Reserved for future definition by this specification.
10b The device is an ASF-sensor.
01b The device is an alert-sending device.
00h Reserved for future definition by this specification.
1 7 1 1 8 1 1 7 1 1 8 1
S Slave Address Wr A Command A S Slave Address Rd A Byte
Count
A
• • •
ASF Device
Address
0 0 Sensor Device
0000 0001
0 ASF Device
Address
1 0 0000
0011
0
8 1 8 1 8 1 8 1 1
Data1 A Data2 A Data3 A PEC ~A P
Sub Command
Device Type Poll
0001 0011
0 Version Number
0001 0000
0 ASF Function Bits 0 [data dependent] 1
5.3.2 Set System State Message
This message is used by the managed client’s firmware to record the client’s current System
State into an alert-sending device. The alert-sending device reports the System State written by
this message in subsequently issued ASF-RMCP System State Response (42h) messages;
section 3.2.4.5 defines the format of the System State byte.
Note: The alert-sending device is responsible for maintaining the System State information.
After a reset, the alert-sending device reports the value as Unknown (1110b) until the device
receives the first Set System State message.
The Set System State message format is as follows:
1 7 1 1 8 1 8 1 8 1
S Slave Address Wr A Command A Byte Count A Data1 A
• • •
Alert-sending Device Address 0 0 System State
0000 0001
0 0000 0011 0 Sub Command
Set System State
0001 1000
0