Compaq dc7100 HP Compaq dc71xx and dx61xx Series Business Desktop Computers Te - Page 166

BIOS ROM 8.6 PnP Support The BIOS includes Plug 'n Play (PnP) support for PnP version 1.0A. Table 8-6 lists the PnP functions supported. Table 8-6. PnP BIOS Functions Function Register 00h Get number of system device nodes 01h Get system device node 02h Set system device node 03h Get event 04h Send message 50h Get SMBIOS Structure Information 51h Get Specific SMBIOS Structure The BIOS call INT 15, AX=E841h, BH=01h can be used by an application to retrieve the default settings of PnP devices for the user. The application should use the following steps for the display function: 1. Call PnP function 01(get System Device Node) for each devnode with bit 1 of the control flag set (get static configuration) and save the results. 2. Call INT 15, AX=E841h, BH=01h. 3. Call PnP "Get Static Configuration" for each devnode and display the defaults. 4. If the user chooses to save the configuration, no further action is required. The system board devices will be configured at the next boot. If the user wants to abandon the changes, then the application must call PnP function 02 (Set System Device Node) for each devnode (with bit 1 of the control flag set for static configuration) with the results from the calls made prior to invoking this function. 8-18 361834-002 Technical Reference Guide