Int 2F/AX=1684h/BX=304Ch

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Intel Plug-and-Play - CONFIGURATION ACCESS - GET ENTRY POINT

AX = 1684h
BX = 304Ch (ID for Configuration Access) (see #02642)
ES:DI = 0000h:0000h

Return:
ES:DI -> API entry point (see #02700) 0000h:0000h if Configuration Access not loaded

Note: This API is often provided by a DOS device driver, in which case it is available whether or not MSWindows is running

Index:
Installation check;Plug-and-Play Configuration Access

See Also: AX=1684h/BX=0034h

(Table 02700) Call Plug-and-Play Configuration Access entry point with:. AX = function 0000h "CA_GetVersion"

Return:
AX = BCD version (AH = major, AL = minor) 0001h "CA_PCI_Read_Config_Byte" (see also INT 1A/AX=B108h). !!! 0002h "CA_PCI_Read_Config_Word" (see also INT 1A/AX=B109h) 0003h "CA_PCI_Read_Config_DWord" (see also INT 1A/AX=B10Ah) 0004h "CA_PCI_Write_Config_Byte" (see also INT 1A/AX=B10Bh) 0005h "CA_PCI_Write_Config_Word" (see also INT 1A/AX=B10Ch) 0006h "CA_PCI_Write_Config_DWord" (see also INT 1A/AX=B10Dh) 0007h "CA_PCI_Generate_Special_Cycle" (see also INT 1A/AX=B106h) 0008h "CA_PCI_Get_Routing_Options" (see also INT 1A/AX=B10Eh) 0009h invalid function 000Ah invalid function 000Bh "CA_PnPISA_Get_Info" 000Ch "CA_PnPISA_Read_Config_Byte" 000Dh "CA_PnPISA_Write_Config_Byte" 000Eh "CA_PnPISA_Get_Resource_Data" 000Fh invalid function 0010h "CA_EISA_Get_Board_ID" 0011h "CA_EISA_Get_Slot_Config" 0012h "CA_EISA_Get_SlotFunc_Config" 0013h "CA_EISA_Clear_NVRAM_Config" 0014h "CA_EISA_Write_Config" 0015h invalid function 0016h "CA_ESCD_Get_Info" 0017h "CA_ESCD_Read_Config" 0018h "CA_ESCD_Write_Config" 0019h invalid function 001Ah "CA_Acfg_PCI_Manage_IRQs" DL = IRQ??? ES:DI -> ???

Return:
AX = status 001Bh "CA_Acfg_PCI_Get_Routing_Options" ES:DI -> IRQ routing table header (see #01259 at INT 1A/AX=B406h)

Return:
AX = status 001Ch-001Fh invalid functions 0020h "CA_PnPB_Get_Num_Sys_Dev_Nodes" 0021h "CA_PnPB_Get_Sys_Dev_Node" 0022h "CA_PnPB_Set_Sys_Dev_Node" 0023h "CA_PnPB_Get_Stat_Res_Info" 0024h "CA_PnPB_Set_Stat_Res_Info"

Return:
AX = FFFFh if unsupported function

See Also: #02701

Category: Non-Volatile Config Storage - Int 2Fh - I

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