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

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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