b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/****************************************************************************
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* Realmode X86 Emulator Library
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* Copyright (C) 1996-1999 SciTech Software, Inc.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* Copyright (C) David Mosberger-Tang
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* Copyright (C) 1999 Egbert Eich
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* ========================================================================
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* Permission to use, copy, modify, distribute, and sell this software and
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* its documentation for any purpose is hereby granted without fee,
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* provided that the above copyright notice appear in all copies and that
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* both that copyright notice and this permission notice appear in
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* supporting documentation, and that the name of the authors not be used
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* in advertising or publicity pertaining to distribution of the software
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* without specific, written prior permission. The authors makes no
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* representations about the suitability of this software for any purpose.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* It is provided "as is" without express or implied warranty.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* PERFORMANCE OF THIS SOFTWARE.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* ========================================================================
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* Language: ANSI C
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* Environment: Any
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* Developer: Kendall Bennett
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* Description: Header file for x86 register definitions.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync****************************************************************************/
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/*---------------------- Macros and type definitions ----------------------*/
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * General EAX, EBX, ECX, EDX type registers. Note that for
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * portability, and speed, the issue of byte swapping is not addressed
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * in the registers. All registers are stored in the default format
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * available on the host machine. The only critical issue is that the
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * registers should line up EXACTLY in the same manner as they do in
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * the 386. That is:
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * EAX & 0xff === AL
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * EAX & 0xffff == AX
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * etc. The result is that alot of the calculations can then be
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * done using the native instruction set fully.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsynctypedef struct {
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsynctypedef struct {
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsynctypedef struct {
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync#else /* !__BIG_ENDIAN__ */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsynctypedef struct {
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsynctypedef struct {
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsynctypedef struct {
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync#endif /* BIG_ENDIAN */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsynctypedef union {
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Segment registers here represent the 16 bit quantities
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * CS, DS, ES, SS.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* 8 bit registers */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* 16 bit registers */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* 32 bit extended registers */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* special registers */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* special registers */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* special registers */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* segment registers */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* flag conditions */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* 80286 and above always have bit#1 set */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync#define F_ALWAYS_ON (0x0002) /* flag bits always on */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Define a mask for only those flag bits we will ever pass back
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * (via PUSHF)
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync#define F_MSK (FB_CF|FB_PF|FB_AF|FB_ZF|FB_SF|FB_TF|FB_IF|FB_DF|FB_OF)
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* following bits masked in to a 16bit quantity */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync#define F_PF_CALC 0x010000 /* PARITY flag has been calced */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync#define F_ZF_CALC 0x020000 /* ZERO flag has been calced */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync#define F_SF_CALC 0x040000 /* SIGN flag has been calced */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync#define F_ALL_CALC 0xff0000 /* All have been calced */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Emulator machine state.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Segment usage control.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsynctypedef struct {
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * MODE contains information on:
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * REPE prefix 2 bits repe,repne
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * SEGMENT overrides 5 bits normal,DS,SS,CS,ES
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Delayed flag set 3 bits (zero, signed, parity)
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * reserved 6 bits
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * interrupt # 8 bits instruction raised interrupt
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * BIOS video segregs 4 bits
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Interrupt Pending 1 bits
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Extern interrupt 1 bits
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Halted 1 bits
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync volatile int intr; /* mask of pending interrupts */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/****************************************************************************
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsyncStructure maintaining the emulator machine state.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsyncmem_base - Base real mode memory for the emulator
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsyncmem_size - Size of the real mode memory block for the emulator
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsyncprivate - private data pointer
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsyncx86 - X86 registers
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync****************************************************************************/
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsynctypedef struct {
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/*----------------------------- Global Variables --------------------------*/
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* Global emulator machine state.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * We keep it global to avoid pointer dereferences in the code for speed.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/*-------------------------- Function Prototypes --------------------------*/
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* Function to log information at runtime */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync} /* End of "C" linkage for C++ */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync#endif /* __X86EMU_REGS_H */