Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

◄Function Group►                                      ◄Up► ◄Next► ◄Previous►
────────────────────────────────────────────────────────────────────────────
 
#define INCL_DOSDEVICES
 
USHORT DosDevConfig(pvDevInfo, usItem, usReserved)
PVOID pvDevInfo;      /* pointer to variable for device information */
USHORT usItem;        /* item number                                */
USHORT usReserved;    /* must be zero                               */
 
The DosDevConfig function retrieves information about attached devices.
 
The DosDevConfig function is a family API function.
 
Parameter   Description
────────────────────────────────────────────────────────────────────────────
 
pvDevInfo   Points to the variable that receives device information. The
            type of information received depends on the value of the usItem
            parameter.
 
usItem      Specifies what device information to retrieve. This parameter
            can be one of the following values:
 
            Value                Meaning
            ────────────────────────────────────────────────────────────────
            DEVINFO_ADAPTER      The pvDevInfo parameter points to a BYTE
                                 variable that is set to FALSE if the
                                 primary display adapter is a
                                 monochrome/printer display adapter type, or
                                 to TRUE for other display adapters.
 
            DEVINFO_COPROCESSOR  The pvDevInfo parameter points to a BYTE
                                 variable that is set to TRUE if a math
                                 coprocessor is present.
 
            DEVINFO_FLOPPY       The pvDevInfo parameter points to a USHORT
                                 variable that receives the number of
                                 removable-disk drives that are installed.
 
            DEVINFO_MODEL        The pvDevInfo parameter points to a BYTE
                                 variable that receives the PC model type.
 
            DEVINFO_PRINTER      The pvDevInfo parameter points to a USHORT
                                 variable that receives the number of
                                 printers that are attached.
 
            DEVINFO_RS232        The pvDevInfo parameter points to a USHORT
                                 variable that receives the number of RS232
                                 cards that are attached.
 
            DEVINFO_SUBMODEL     The pvDevInfo parameter points to a BYTE
                                 variable that receives the PC submodel
                                 type.
 
usReserved  Specifies a reserved value; must be zero.
 
Return Value
 
The return value is zero if the function is successful. Otherwise, it is an
error value, which may be the following:
 
     ERROR_INVALID_PARAMETER
 
Example
 
This example calls the DosDevConfig function to determine if a math
coprocessor is present:
 
BYTE bDevInfo;
DosDevConfig(&bDevInfo,     /* address of variable for device info. */
    DEVINFO_COPROCESSOR,    /* information requested                */
    0);                     /* reserved                             */
if (bDevInfo)
    VioWrtTTY("Math coprocessor present\r\n", 26, 0);
else
    VioWrtTTY("Math coprocessor not present\r\n", 30, 0);
 
See Also
 
DosDevIOCtl, VioGetConfig
 
                                      ♦