1 /* $Id: u_dpmi.h,v 1.4 2004-08-28 23:17:45 schaffner Exp $ */
3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
4 SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
5 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
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8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
9 FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
12 COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
17 * Prototypes for DPMI services.
26 typedef struct dpmi_real_regs {
30 uint reserved_by_system;
36 ushort es,ds,fs,gs,ip,cs,sp,ss;
40 #pragma intrinsic( inp );
41 #pragma intrinsic( outp );
42 #pragma intrinsic( _enable );
43 #pragma intrinsic( _disable );
46 /* inp & outp are functions in DJGPP, while inportb & outportb are inlined */
47 #define inp(port) inportb(port)
48 #define outp(port,value) outportb(port,value)
49 #if 0 /* only causes problems */
52 #define _enable() __asm__ __volatile__ ("sti")
53 #define _disable() __asm__ __volatile__ ("cli")
58 #include "sys/nearptr.h"
59 #define DPMI_real_segment(P) ((((uint)(P)-(uint)(__djgpp_conventional_base)) >> 4) & 0xffff)
60 #define DPMI_real_offset(P) (((uint)(P)-(uint)(__djgpp_conventional_base)) & 0xf)
62 #define DPMI_real_segment(P) ((((uint) (P)) >> 4) & 0xFFFF)
63 #define DPMI_real_offset(P) (((uint) (P)) & 0xF)
66 // Initializes dpmi. Returns zero if failed.
67 extern int dpmi_init(int verbose);
68 // Returns a pointer to a temporary dos memory block. Size must be < 1024 bytes.
69 extern void *dpmi_get_temp_low_buffer( int size );
70 extern void *dpmi_real_malloc( int size, ushort *selector );
71 extern void dpmi_real_free( ushort selector );
72 extern void dpmi_real_int386x( ubyte intno, dpmi_real_regs * rregs );
73 extern void dpmi_real_call(dpmi_real_regs * rregs);
74 extern int dpmi_lock_region(void *address, unsigned length);
75 extern int dpmi_unlock_region(void *address, unsigned length);
76 // returns 0 if failed...
77 extern int dpmi_allocate_selector( void * address, int size, ushort * selector );
78 extern int dpmi_modify_selector_base( ushort selector, void * address );
79 extern int dpmi_modify_selector_limit( ushort selector, int size );
82 #if defined(__GNUC__) || defined(_MSC_VER) || defined(macintosh)
87 // Sets the PM handler. Returns 0 if succssful
88 extern int dpmi_set_pm_handler(unsigned intnum, void _far * isr );
90 extern unsigned int dpmi_virtual_memory;
91 extern unsigned int dpmi_available_memory;
92 extern unsigned int dpmi_physical_memory;
93 extern unsigned int dpmi_dos_memory;