View source for PSDHLP CALL REAL MODE

Call a PSD function in real mode.

This function is used by the PSD developer to call one of his PSD functions in real mode.

; Mode : Callable in Init mode only.

==Syntax== 
 PSDHLP_CALL_REAL_MODE <keywords>

==Parameters==
Pointer to a CALL_REAL_MODE structure.

   ulong_t function;
   ulong_t pdata;

; function : contains the linear address of the function to be called in real mode.
; pdata : contains the linear address of a parameter to be passed to the real mode function. The parameter is pointed to by DS:SI on entry to the called function.
==Return Code==
A return code may be returned by the real mode function in EAX.

==Remarks==
The function can not call a PSD help that may block.

==Structure==
<PRE>
typedef struct call_real_mode_s {
   ulong_t function;
   ulong_t pdata;
} CALL_REAL_MODE;
</PRE>

[[Category:PSD]]