NVM Information
Table 19. Boot Agent Configuration Customization Options (Word 31h)
Bit | Name | Description | |
|
|
| |
15:14 | SIG | Signature. These bits must be set to 01b to indicate that this word has | |
been programmed by the agent or other configuration software. | |||
|
| ||
|
|
| |
13:11 | Reserved | Reserved for future use. All bits must be set to 0b. | |
|
|
| |
|
| Selects the agent's boot order setup mode. This field changes the | |
|
| agent's default behavior in order to make it compatible with systems | |
|
| that do not completely support the BBS and PnP Expansion ROM | |
|
| standards. Valid values and their meanings are: | |
|
| 000b = Normal behavior. The agent attempts to detect BBS and PnP | |
|
| Expansion ROM support as it normally does. | |
|
| 001b = Force Legacy mode. The agent does not attempt to detect BBS | |
|
| or PnP Expansion ROM supports in the BIOS and assumes the BIOS is | |
|
| not compliant. The BIOS boot order can be changed in the Setup Menu. | |
|
| 010b = Force BBS mode. The agent assumes the BIOS is BBS- | |
|
| compliant, even though it may not be detected as such by the agent's | |
|
| detection code. The BIOS boot order CANNOT be changed in the Setup | |
10:8 | MODE | Menu. | |
011b = Force PnP Int18 mode. The agent assumes the BIOS allows | |||
|
| ||
|
| boot order setup for PnP Expansion ROMs and hooks interrupt 18h (to | |
|
| inform the BIOS that the agent is a bootable device) in addition to | |
|
| registering as a BBS IPL device. The BIOS boot order CANNOT be | |
|
| changed in the Setup Menu. | |
|
| 100b = Force PnP Int19 mode. The agent assumes the BIOS allows | |
|
| boot order setup for PnP Expansion ROMs and hooks interrupt 19h (to | |
|
| inform the BIOS that the agent is a bootable device) in addition to | |
|
| registering as a BBS IPL device. The BIOS boot order CANNOT be | |
|
| changed in the Setup Menu. | |
|
| 101b = Reserved for future use. If specified, treated as value 000b. | |
|
| 110b = Reserved for future use. If specified, treated as value 000b. | |
|
| 111b = Reserved for future use. If specified, treated as value 000b. | |
|
|
| |
7:6 | Reserved | Reserved for future use. These bits must be set to 0b. | |
|
|
| |
|
| Disable Flash Update. | |
5 | DFU | If set to 1b, no updates to the Flash image using PROSet is allowed. | |
|
| The default for this bit is 0b; allow Flash image updates using PROSet. | |
|
|
| |
|
| Disable Legacy Wakeup Support. | |
|
| If set to 1b, no changes to the Legacy OS Wakeup Support menu | |
4 | DLWS | option is allowed. | |
|
| The default for this bit is 0b; allow Legacy OS Wakeup Support menu | |
|
| option changes. | |
|
|
| |
|
| Disable Boot Selection. | |
3 | DBS | If set to 1b, no changes to the boot order menu option is allowed. | |
|
| The default for this bit is 0b; allow boot order menu option changes. | |
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|
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20
