f78b12e570284aa8291f4ca1add24937fd107403vboxsync/****************************************************************************
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* Realmode X86 Emulator Library
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* Copyright (C) 1996-1999 SciTech Software, Inc.
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* Copyright (C) David Mosberger-Tang
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* Copyright (C) 1999 Egbert Eich
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* ========================================================================
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* Permission to use, copy, modify, distribute, and sell this software and
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* its documentation for any purpose is hereby granted without fee,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* provided that the above copyright notice appear in all copies and that
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* both that copyright notice and this permission notice appear in
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* supporting documentation, and that the name of the authors not be used
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* in advertising or publicity pertaining to distribution of the software
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* without specific, written prior permission. The authors makes no
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* representations about the suitability of this software for any purpose.
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* It is provided "as is" without express or implied warranty.
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* PERFORMANCE OF THIS SOFTWARE.
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* ========================================================================
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* Language: ANSI C
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* Environment: Any
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* Developer: Kendall Bennett
f78b12e570284aa8291f4ca1add24937fd107403vboxsync* Description: Header file for x86 register definitions.
f78b12e570284aa8291f4ca1add24937fd107403vboxsync****************************************************************************/
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/*---------------------- Macros and type definitions ----------------------*/
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * General EAX, EBX, ECX, EDX type registers. Note that for
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * portability, and speed, the issue of byte swapping is not addressed
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * in the registers. All registers are stored in the default format
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * available on the host machine. The only critical issue is that the
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * registers should line up EXACTLY in the same manner as they do in
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * the 386. That is:
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * EAX & 0xff === AL
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * EAX & 0xffff == AX
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * etc. The result is that alot of the calculations can then be
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * done using the native instruction set fully.
f78b12e570284aa8291f4ca1add24937fd107403vboxsynctypedef struct {
f78b12e570284aa8291f4ca1add24937fd107403vboxsynctypedef struct {
f78b12e570284aa8291f4ca1add24937fd107403vboxsynctypedef struct {
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#else /* !__BIG_ENDIAN__ */
f78b12e570284aa8291f4ca1add24937fd107403vboxsynctypedef struct {
f78b12e570284aa8291f4ca1add24937fd107403vboxsynctypedef struct {
f78b12e570284aa8291f4ca1add24937fd107403vboxsynctypedef struct {
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#endif /* BIG_ENDIAN */
f78b12e570284aa8291f4ca1add24937fd107403vboxsynctypedef union {
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Segment registers here represent the 16 bit quantities
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * CS, DS, ES, SS.
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/* 8 bit registers */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/* 16 bit registers */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/* 32 bit extended registers */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/* special registers */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/* special registers */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/* special registers */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/* segment registers */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/* flag conditions */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/* 80286 and above always have bit#1 set */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define F_ALWAYS_ON (0x0002) /* flag bits always on */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Define a mask for only those flag bits we will ever pass back
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * (via PUSHF)
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define F_MSK (FB_CF|FB_PF|FB_AF|FB_ZF|FB_SF|FB_TF|FB_IF|FB_DF|FB_OF)
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/* following bits masked in to a 16bit quantity */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define F_PF_CALC 0x010000 /* PARITY flag has been calced */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define F_ZF_CALC 0x020000 /* ZERO flag has been calced */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define F_SF_CALC 0x040000 /* SIGN flag has been calced */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define F_ALL_CALC 0xff0000 /* All have been calced */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Emulator machine state.
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Segment usage control.
f78b12e570284aa8291f4ca1add24937fd107403vboxsynctypedef struct {
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * MODE contains information on:
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * REPE prefix 2 bits repe,repne
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * SEGMENT overrides 5 bits normal,DS,SS,CS,ES
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Delayed flag set 3 bits (zero, signed, parity)
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * reserved 6 bits
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * interrupt # 8 bits instruction raised interrupt
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * BIOS video segregs 4 bits
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Interrupt Pending 1 bits
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Extern interrupt 1 bits
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Halted 1 bits
f78b12e570284aa8291f4ca1add24937fd107403vboxsync volatile int intr; /* mask of pending interrupts */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/****************************************************************************
f78b12e570284aa8291f4ca1add24937fd107403vboxsyncStructure maintaining the emulator machine state.
f78b12e570284aa8291f4ca1add24937fd107403vboxsyncmem_base - Base real mode memory for the emulator
f78b12e570284aa8291f4ca1add24937fd107403vboxsyncmem_size - Size of the real mode memory block for the emulator
f78b12e570284aa8291f4ca1add24937fd107403vboxsyncprivate - private data pointer
f78b12e570284aa8291f4ca1add24937fd107403vboxsyncx86 - X86 registers
f78b12e570284aa8291f4ca1add24937fd107403vboxsync****************************************************************************/
f78b12e570284aa8291f4ca1add24937fd107403vboxsynctypedef struct {
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/*----------------------------- Global Variables --------------------------*/
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/* Global emulator machine state.
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * We keep it global to avoid pointer dereferences in the code for speed.
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/*-------------------------- Function Prototypes --------------------------*/
f78b12e570284aa8291f4ca1add24937fd107403vboxsync/* Function to log information at runtime */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync} /* End of "C" linkage for C++ */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#endif /* __X86EMU_REGS_H */