sys_fmem.c

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/* fre() function */

#include "../fb.h"
#include <dpmi.h>

FBCALL size_t fb_GetMemAvail( int mode )
{
        __dpmi_free_mem_info info;
        (void)__dpmi_get_free_memory_information(&info);
        return info.total_number_of_free_pages * 4096;
}