Int 2F Fn 1684  - Intel Plug-and-play - Configuration Manager - Get Entry  [x]

   AX = 1684h
   BX = 0034h (ID for Configuration Manager) (see #2329)
   ES:DI = 0000h:0000h

Return: ES:DI -> API entry point (see #2360)
         0000h:0000h if Configuration Manager 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 Manager

See Also: AX=1684h/BX=304Ch

(Table 2360)
Call Configuration Manager entry point with:
   AX = function
       0000h "CM_GetVersion" get supported DDI version

       Return: AH = BCD major version
           AL = BCD minor version
           BX = number of devices identified by configuration

       Note:   returns AX = 0000h if no config manager installed
       0001h "CM_GetConfig" get device configuration
       BX = device index
       ES:DI -> buffer for configuration information (see #2362)

       Return: AX = status
               0000h successful
               ES:DI buffer filled
               other error code (0001h = index out of range)
       0002h "CM_LockConfig" lock device configuration
       ES:DI -> configuration information (see #2362)

       Return: AX = status
               0000h successful
               ES:DI buffer filled with assigned config
               0001h resources conflict
               0002h invalid request or configuration info
       0003h "CM_UnlockConfig" unlock device configuration
       ES:DI -> configuration information (see #2362)

       Return: AX = status
               0000h successful
               ES:DI buffer filled with assigned config
               0001h invalid request or configuration info
       0004h "CME_QueryResources" get hot-swappable resources
       ES:DI -> configuration information (see #2362)

       Return: AX = status (see #2361)
       0005h "CME_AllocResources" remove resources from available pool
       ES:DI -> configuration information (see #2362)

       Return: AX = status (see #2361)
       0006h "CME_DeallocResources" return resources to available pool
       ES:DI -> configuration information (see #2362)

       Return: AX = status (see #2361)

See Also: #0994 at INT 20"Windows",#2359,#2363

(Table 2361)
Values for Configuration Manager status:
 00h   successful
 01h   device not found, configuration error
 02h   I/O port unavailable
 04h   IRQ unavailable
 08h   DMA channel unavailable
 10h   memory range unavailable

See Also: #2360

Format of Configuration Information Structure:
Offset Size    Description (Table 2362)
 00h   DWORD   bus ID
 04h   DWORD   device ID
 08h   DWORD   serial number
 0Ch   DWORD   logical ID
 10h   DWORD   flags
---ISA bus---
 14h   BYTE    Card Select Number
 15h   BYTE    logical device number
 16h   WORD    Read Data port