DevHlp_LogEntry provides a device driver interface to the logging facility.

The description of the LogEntry DevHlp function follows:

        Calling sequence -  LES   BX,log_data_address
                            MOV   CX,service
                            MOV   DL,DevHlp_LogEntry  /* LogEntry function
                                                       code 0x3b */
                            CALL  [Device_Help]

Parameters

log_data_address

is the address of a buffer that contains a variable length Error Log entry. (See the section on the LogAddEntries high level API for further details.) level API for further details.)
service
the class of logging facility:

0x0

Reserved
0x1
"Old-Style" Error Logging call ("old" 16-bit (DosLogEntry-style) data packet provided).
0x2 - 0x2f
Reserved for future use.
0x80 - 0x8f
Reserved for internal use by the System Logging Service device driver.
0x90
"New_Style" Error Logging call ("new" 32-bit (LogAddEntries-style) data packet provided).
0x91 - 0xffff
Reserved for future use.

Returns

Return code in AX:

• Success

  non-zero

  Failure.

  Possible errors:

  Invalid log type
  Facility unavailable
  Facility suspended

  Remarks

  When CX is set to 80H, DS:SI is set to point to the device driver header block of the System Logging Service device driver.

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