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Function RTT_BIOS_NextDevice

This function returns the location of the next PCI device:

int RTT_BIOS_NextDevice(BYTE * Bus, BYTE * DeviceFunc);

Parameters

Bus

Pointer to the returned PCI bus number.

DeviceFunc

Pointer to the returned device number in bits 7 .. 3 and the function number in bits 2 .. 0.

return value

RTT_BIOS_SUCCESSFUL or an error code, see section PCI BIOS.

To retrieve the bus number and device/function of the first installed PCI or PCI Express function, parameter *Bus should be initialized with value RTT_BIOS_NO_PCI_BUS. Subsequent calls will then return each PCI device until the function returns a value other than RTT_BIOS_SUCCESSFUL.

Example:

BYTE Bus, DeviceFunc; 
WORD VendorId, DeviceId; 

printf("List of all installed PCI[e] devices:\n"); 
Bus = RTT_BIOS_NO_PCI_BUS; 
while (RTT_BIOS_NextDevice(&Bus, &DeviceFunc) == RTT_BIOS_SUCCESSFUL) 
{ 
   RTT_BIOS_ReadConfigData(Bus, DeviceFunc, RTT_BIOS_VENDOR_ID, sizeof(WORD), &VendorId); 
   RTT_BIOS_ReadConfigData(Bus, DeviceFunc, RTT_BIOS_DEVICE_ID, sizeof(WORD), &DeviceId); 
   printf("%04X %04X\n", VendorId, DeviceId); 
}

PCI BIOS

Function RTT_BIOS_Installed

Function RTT_BIOS_FindDevice