实现在Windows下直接读写内存的方法.doc

实现在Windows下直接读写内存的方法 1.利用Windows提供的各个段选择符标号,在C源程序中将选择符标号说明为外部变量。其对照表如下:表12.利用宏定义MAKELONG(段内偏移量,&段选择符标号)即可得到一个长指针。3.经上述方法得到的指针与C语言中定义的指针是一样的。4.如果使用的段是D000H或E000H或其它上位内存时,需改动Windows的系统配置文件SYSTEM.INI,利用字符器,在386Enh小节中加入EmmExclude=xxxxyyyy一行,禁止Windows使用这段存储空间。值xxxx和yyyy是16位内存范围。如开发的插件占用D000H段的64K,则应加入这样一行:EmmExclude=d000-dfff。利用这一方法,已使我们自己开发的电路板(占用D000H段),在Windows控制下成功地运行了。考虑到读者没有相应的硬件,这里以读取中断向量、计算机ROM的制造时间和对DOS用户通讯区的读写为例,详见以下程序。对于DOS用户通讯区的内容,读者可用DOS的DEBUG程序检查(D命令)和修改(E命令)。DOS的用户通讯区在004000F0H处开始,共计16个字节。在修改时请注意:从004000F0H开始存放可显示ASCII码字符串,并以0结尾。;MEMORY.DEF模块定义文件NAMEMemoryDESCRIPTIONdemotrateanintergratedmenuEXETYPEWINDOWSSTUBWITUB.EXECODEPRELOADMOVEABLEDISCARDABLEDATAPRELOADMOVEABLEMULTIPLEHEAIZE1024STACKSIZE8192EXPORTSWndProc/*-MEMORY.RC直接读写内存的资源定义文件-*/#includememory.hMemoryMenuMENUBEGINPOPUP取中断向量&IBEGINMENUITEMint0&3h,IDM-INT03HMENUITEMint&10h,IDM-INT10HMENUITEMint&21h,IDM-INT21HENDPOPUPROM区域&RBEGINMENUITEM制造时间&T,IDM-TIMEMENUITEM取用户通讯区&U,IDM-READMENUITEM存用户通讯区,IDM-WRITEENDMENUITEMa退出&X,IDM-EXITEND/*-MEMORY.H直接读写内存的头文件-*/#defineIDM-INT03H101#defineIDM-INT10H102#defineIDM-INT21H103#defineIDM-TIME201#defineIDM-READ202#defineIDM-WRITE203#defineIDM-EXIT300/*-MEMORY.C用户对固定内存直接读写的表演程序-*/#include#includememory.h#includeintPASCALWinMain(HANDLE,HANDLE,LTR,int);longFARPASCALWndProc(HWND,UINT,UINT,LONG);/*-WinMain()-*/intPASCALWinMain(HANDLEhItance,HANDLEhPrevItance,LTRlzCmdLine,intnCmdShow)MSGmsg;HWNDhWnd;WNDCLAwndclaif(!hPrevItance)wndcla.style=CS-HREDRAW|CS-VREDRAW;wndcla.lpfnWndProc=WndProc;wndcla.cbClsExtra=0;wndcla.cbWndExtra=0;wndcla.hItance=hItance;wndcla.hIcon=LoadIcon(NULL,IDI-ALICATION);wndcla.hCursor=LoadCursor(NULL,IDC-ARROW);wndcla.hbrBackground=GetStockObject(WHITE-BRUSH);wndcla.lzMenuName=MemoryMenu;wndcla.lzClaame=直接读写存储器;if(!RegisterCla(&wndcla)returnFALSE;hWnd=CreateWindow(直接读写存储器,直接读写存储器,WS-OVERLAEDWINDOW,CW-USEDEFAULT,CW-USEDEFAULT,CW-USEDEFAULT,CW-USEDEFAULT,NULL,NULL,hItance,NULL);if(!hWnd)returnFALSE;ShowWindow(hWnd,nCmdShow);UpdateWindow(hWnd);while(GetMeage(&msg,NULL,0,0)TralateMeage(&msg);DiatchMeage(&msg);returnmsg.wParam;/*-WndProc()-*/longFARPASCALWndProc(HWNDhWnd,UINTmeage,UINTwParam,LONGlParam)HDChDC;HPENhOldPen,hNewPeRECTrect;TEXTMETRICtm;PAINTSTRUCTUINTi;charStrbuf50;WORDfar*InterruptVector;charfar*bioexternWORD-0000H;externWORD-0040H;externWORD-F000H;switch(meage)caseWM-MAND:switch(wParam)caseIDM-INT03H:InterruptVector=(WORDfar*)MAKELONG(0,&-0000H);wrintf(Strbuf,向量地址:X:XHn,*(InterruptVector0x06),*(InterruptVector0x07);MeageBox(hWnd,Strbuf,int03h,MB-OK|MB-ICOTOP);return0;caseIDM-INT10H:InterruptVector=(WORDfar*)MAKELONG(0,&-0000H);wrintf(Strbuf,向量地址:X:XHn,*(InterruptVector0x20),*(InterruptVector0x21);MeageBox(hWnd,Strbuf,int10h,MBOK|MB-ICOTOP);return0;caseIDM-INT21H:InterruptVector=(WORDfar*)MAKELONG(0,&-0000H);wrintf(Strbuf,向量地址:X:XHn,*(InterruptVector0x42),*(InterruptVector0x43);MeageBox(hWnd,Strbuf,int21h,MB-OK|MB-ICOTOP);return0;caseIDM-TIME:bios=(charfar*)MAKELONG(0xfff5,&-F000H);MeageBox(hWnd,bios,ROM制造时间,MB-OK|MB-ICOTOP);return0;caseIDM-READ:bios=(charfar*)MAKELONG(0xF0,&-0040H);MeageBox(hWnd,bios,取用户通讯区内容,MB-OK|MB-ICOTOP);return0;caseIDM-WRITE:bios=(charfar*)MAKELONG(0xF0,&-0040H);for(i=0;i10;i)*(biosi)=Ai;*(bios10)=0;MeageBox(hWnd,WriteA-Jcharstring!,写用户通讯区内容,MB-OK|MB-ICOTOP);return0;caseIDM-EXIT:SendMeage(hWnd,WM-CLOSE,0,0);return0;break;caseWM-DESTROY:PostQuitMeage(0);return0;default:break;returnDefWindowProc(hWnd,meage,wParam,lParam);/*-EndProgrammingofDemo-*/ 1.利用Windows提供的各个段选择符标号,在C源程序中将选择符标号说明为外部变量。其对照表如下:表12.利用宏定义MAKELONG(段内偏移量,&段选择符标号)即可得到一个长指针。3.经上述方法得到的指针与C语言中定义的指针是一样的。4.如果使用的段是D000H或E000H或其它上位内存时,需改动Windows的系统配置文件SYSTEM.INI,利用字符器,在386Enh小节中加入EmmExclude=xxxxyyyy一行,禁止Windows使用这段存储空间。值xxxx和yyyy是16位内存范围。如开发的插件占用D000H段的64K,则应加入这样一行:EmmExclude=d000-dfff。利用这一方法,已使我们自己开发的电路板(占用D000H段),在Windows控制下成功地运行了。考虑到读者没有相应的硬件,这里以读取中断向量、计算机ROM的制造时间和对DOS用户通讯区的读写为例,详见以下程序。对于DOS用户通讯区的内容,读者可用DOS的DEBUG程序检查(D命令)和修改(E命令)。DOS的用户通讯区在004000F0H处开始,共计16个字节。在修改时请注意:从004000F0H开始存放可显示ASCII码字符串,并以0结尾。;MEMORY.DEF模块定义文件NAMEMemoryDESCRIPTIONdemotrateanintergratedmenuEXETYPEWINDOWSSTUBWITUB.EXECODEPRELOADMOVEABLEDISCARDABLEDATAPRELOADMOVEABLEMULTIPLEHEAIZE1024STACKSIZE8192EXPORTSWndProc/*-MEMORY.RC直接读写内存的资源定义文件-*/#includememory.hMemoryMenuMENUBEGINPOPUP取中断向量&IBEGINMENUITEMint0&3h,IDM-INT03HMENUITEMint&10h,IDM-INT10HMENUITEMint&21h,IDM-INT21HENDPOPUPROM区域&RBEGINMENUITEM制造时间&T,IDM-TIMEMENUITEM取用户通讯区&U,IDM-READMENUITEM存用户通讯区,IDM-WRITEENDMENUITEMa退出&X,IDM-EXITEND/*-MEMORY.H直接读写内存的头文件-*/#defineIDM-INT03H101#defineIDM-INT10H102#defineIDM-INT21H103#defineIDM-TIME201#defineIDM-READ202#defineIDM-WRITE203#defineIDM-EXIT300/*-MEMORY.C用户对固定内存直接读写的表演程序-*/#include#includememory.h#includeintPASCALWinMain(HANDLE,HANDLE,LTR,int);longFARPASCALWndProc(HWND,UINT,UINT,LONG);/*-WinMain()-*/intPASCALWinMain(HANDLEhItance,HANDLEhPrevItance,LTRlzCmdLine,intnCmdShow)MSGmsg;HWNDhWnd;WNDCLAwndclaif(!hPrevItance)wndcla.style=CS-HREDRAW|CS-VREDRAW;wndcla.lpfnWndProc=WndProc;wndcla.cbClsExtra=0;wndcla.cbWndExtra=0;wndcla.hItance=hItance;wndcla.hIcon=LoadIcon(NULL,IDI-ALICATION);wndcla.hCursor=LoadCursor(NULL,IDC-ARROW);wndcla.hbrBackground=GetStockObject(WHITE-BRUSH);wndcla.lzMenuName=MemoryMenu;wndcla.lzClaame=直接读写存储器;if(!RegisterCla(&wndcla)returnFALSE;hWnd=CreateWindow(直接读写存储器,直接读写存储器,WS-OVERLAEDWINDOW,CW-USEDEFAULT,CW-USEDEFAULT,CW-USEDEFAULT,CW-USEDEFAULT,NULL,NULL,hItance,NULL);if(!hWnd)returnFALSE;ShowWindow(hWnd,nCmdShow);UpdateWindow(hWnd);while(GetMeage(&msg,NULL,0,0)TralateMeage(&msg);DiatchMeage(&msg);returnmsg.wParam;/*-WndProc()-*/longFARPASCALWndProc(HWNDhWnd,UINTmeage,UINTwParam,LONGlParam)HDChDC;HPENhOldPen,hNewPeRECTrect;TEXTMETRICtm;PAINTSTRUCTUINTi;charStrbuf50;WORDfar*InterruptVector;charfar*bioexternWORD-0000H;externWORD-0040H;externWORD-F000H;switch(meage)caseWM-MAND:switch(wParam)caseIDM-INT03H:InterruptVector=(WORDfar*)MAKELONG(0,&-0000H);wrintf(Strbuf,向量地址:X:XHn,*(InterruptVector0x06),*(InterruptVector0x07);MeageBox(hWnd,Strbuf,int03h,MB-OK|MB-ICOTOP);return0;caseIDM-INT10H:InterruptVector=(WORDfar*)MAKELONG(0,&-0000H);wrintf(Strbuf,向量地址:X:XHn,*(InterruptVector0x20),*(InterruptVector0x21);MeageBox(hWnd,Strbuf,int10h,MBOK|MB-ICOTOP);return0;caseIDM-INT21H:InterruptVector=(WORDfar*)MAKELO