__dpmi_allocate_real_mode_callback

Syntax

#include <dpmi.h>

int __dpmi_allocate_real_mode_callback(void (*_handler)(void), __dpmi_regs *_regs, __dpmi_raddr *_ret);

Description

Please refer to section DPMI Specification for details on DPMI function call operation. Also see section DPMI Overview for general information.

DPMI function AX = 0x0303

This function gives you a real-mode address to pass to TSRs that gets reflected to your protected-mode handler. You pass it a register block to use; it gets filled in with the real-mode registers when your handler is called, and the registers are set from it when the handler returns.

Return Value

-1 on error, else zero.

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