测试VGA12H直接写屏速度 V1.1

File:      VGASpeed.txt
Name:      测试VGA12H模式的速度
Author:    zyl910
Blog:      http://blog.csdn.net/zyl910/
Version:   V1.1
Updata:    2006-11-23

下载（注意修改下载后的扩展名）

　　经过上一次的测试后，发现读显存的速度比写显存的速度慢得多。
　　很多资料建议我们使用写模式1来实现显存内的位图传送。当使用写模式1进行位图传送时，是一边读一边写的形式。而现在内存读速度很慢，那么会不会影响位图传送速度呢？于是我做了个测试。

 

测试结果
~~~~~~~~

CPU 　　: AMD Athlon XP 1700+（实际频率：1463 MHz (11 x 133)）
内存　　: DDR266 256MB
显卡　　: NVIDIA GeForce2 MX/MX 400（AGP 4X）
显存带宽: 125MHz * 128bit = 2000MB/s
操作系统: Windows XP SP2
[FPS: C]
Video  to System:         11.3000
System to Video :         51.0807
OffScr to System:         11.7646
System to OffScr:         51.6840
Video  to OffScr:         37.1039
OffScr to Video :         37.0033
[FPS: movsb]
Video  to System:         11.9657
System to Video :         85.5702
OffScr to System:         11.9657
System to OffScr:         85.5702
Video  to OffScr:         37.2044
OffScr to Video :         37.3050
[FPS: movsw]
Video  to System:         23.5293
System to Video :        122.4729
OffScr to System:         23.6298
System to OffScr:        122.2718
[FPS: movsd]
Video  to System:         44.7459
System to Video :        152.7392
OffScr to System:         44.8464
System to OffScr:        152.4376

 

CPU 　　: AMD Athlon XP 1700+（实际频率：1463 MHz (11 x 133)）
内存　　: DDR266 256MB
显卡　　: NVIDIA GeForce2 MX/MX 400（AGP 4X）
显存带宽: 125MHz * 128bit = 2000MB/s
操作系统: Windows 98SE
[FPS: C]
Video  to System:         11.6641
System to Video :         60.7337
OffScr to System:         11.7000
System to OffScr:         60.5326
Video  to OffScr:         35.3945
OffScr to Video :         35.4950
[FPS: movsb]
Video  to System:         11.9657
System to Video :         98.9436
OffScr to System:         11.9657
System to OffScr:         99.2453
Video  to OffScr:         35.6961
OffScr to Video :         35.6961
[FPS: movsw]
Video  to System:         23.4287
System to Video :        173.4530
OffScr to System:         23.5293
System to OffScr:        173.4530
[FPS: movsd]
Video  to System:         44.4442
System to Video :        268.1735
OffScr to System:         44.4442
System to OffScr:        269.5812

 

CPU 　　: AMD Athlon XP 1700+（实际频率：1463 MHz (11 x 133)）
内存　　: DDR266 256MB
显卡　　: NVIDIA GeForce2 MX/MX 400（AGP 4X）
显存带宽: 125MHz * 128bit = 2000MB/s
操作系统: DOS实模式
[FPS: C]
Video  to System:         11.7646
System to Video :         61.2365
OffScr to System:         11.8652
System to OffScr:         61.1359
Video  to OffScr:         37.2044
OffScr to Video :         37.2044
[FPS: movsb]
Video  to System:         12.0663
System to Video :        108.0939
OffScr to System:         12.0663
System to OffScr:        108.3956
Video  to OffScr:         37.4055
OffScr to Video :         37.3050
[FPS: movsw]
Video  to System:         23.6298
System to Video :        190.4464
OffScr to System:         23.7304
System to OffScr:        190.5470
[FPS: movsd]
Video  to System:         44.9470
System to Video :        278.9326
OffScr to System:         44.9470
System to OffScr:        279.4354

 

CPU 　　: Intel Celeron, 1000 MHz (10 x 100)
内存　　: SDRAM 256MB
显卡　　: ATI Radeon 9550（AGP 4X）
显存带宽: 392MHz * 128bit = 6272MB/s
操作系统: Windows XP SP2
[FPS: C]
Video  to System:         11.5000
System to Video :         52.0862
OffScr to System:         11.6641
System to OffScr:         52.0862
Video  to OffScr:         32.6796
OffScr to Video :         32.5790
[FPS: movsb]
Video  to System:         11.6641
System to Video :         51.8851
OffScr to System:         11.6000
System to OffScr:         52.0862
Video  to OffScr:         32.6796
OffScr to Video :         32.5790
[FPS: movsw]
Video  to System:         22.2221
System to Video :         76.4199
OffScr to System:         22.1215
System to OffScr:         76.7215
[FPS: movsd]
Video  to System:         40.5227
System to Video :        100.3514
OffScr to System:         40.5227
System to OffScr:        100.3514

 

分析
~~~~

一、用写模式1实现的位图传送的确不够快
　　跟我们猜想的一样，位图传送的确不够快，才30多帧。

　　让我们理论分析一下。
　　每一次是先读再写，且每次硬件会利用锁存器一次性复制4个字节，所以速度为：1/(1/11.3000 + 1/51.0807)*4 = 9.25305 * 4 = 37.0122
　　与测试结果相符。

　　看来不能在VGA12H下利用显存内位图传送实现高速动画。最佳方案是先在内存中将屏幕画好，再一次性传送到显存。反正现在CPU主频够高，DDR内存条访问速度够快。
　　估计写模式1只能用作填充（如清屏）。

二、访问离屏显存并没有比访问主表面显存快

　　受某些早期资料的误导，曾以为访问离屏显存会比较快。可是现代的显卡都有缓冲机制，所以无论是访问主表面显存，还是访问离屏显存，速度都一样快。
　　当然在有条件的时候，应该使用离屏显存来实现双缓冲平滑动画。

 

测试代码
~~~~~~~~

 

/* File:      VGA12H.c Name:      测试VGA12H模式的速度 Author:    zyl910 Blog:      http://blog.csdn.net/zyl910/ Version:   V1.0 Updata:    2006-11-23 S: system memory. 系统内存 V: video memory(primary surface). 主表面显存 O: offscreen video memory. 离屏显存 */ #include <stdio.h> #include <conio.h> #include <mem.h> #include <dos.h> typedef unsigned char BYTE; typedef unsigned int  WORD; typedef unsigned long DWORD; typedef void far* LPVOID; #define SCR_W 640 #define SCR_H 480 #define SCR_PLANES 4 #define SCANSIZE_DIB ((SCR_W)/2) #define SCANSIZE_VGA ((SCR_W)/8) #define SEG_VIDEO 0xA000 #define LPOFFSCREEN (MK_FP(SEG_VIDEO, (unsigned)0xF000)) #define WaitVR() while(!(inportb(0x3da)&0x08)) static volatile DWORD far* const pbiosclock = MK_FP(0x0040, 0x6C); #define BIOSCLOCK_F ((double)18.2)   typedef void (*TESTFUNC)(DWORD iF); #define TESTFPS_WAITVR 1 static BYTE byVGA[SCR_PLANES][SCANSIZE_VGA]; void repmovsb(LPVOID lpD, LPVOID lpS, WORD cBytes) {  _asm{   push ds   push es   mov cx, cBytes   les di, lpD   lds si, lpS   cld   rep movsb   pop es   pop ds  } } void repmovsw(LPVOID lpD, LPVOID lpS, WORD cWords) {  _asm{   push ds   push es   mov cx, cWords   les di, lpD   lds si, lpS   cld   rep movsw   pop es   pop ds;  } } void repmovsd(LPVOID lpD, LPVOID lpS, WORD cDWords) {  _asm{   push ds   push es   mov cx, cDWords   les di, lpD   lds si, lpS   cld   db 0x66; rep movsw; /* rep movsd */   pop es   pop ds  } } void vgasetvideomode(BYTE bymode) {  _asm{   mov al, bymode;   mov ah, 0x00;   int 0x10;  } } int vgasetwritemode(int mode) {  BYTE by;  outportb(0x3CE, 5);  by = inportb(0x3CF);  outportb(0x3CF, (by & 0xFC) | (mode & 0x03));  return mode & 0x03; } void vgasetreadplane(BYTE n) {  _asm{   mov dx, 0x3CE; /* gc[4]:Read Map Select */   mov al, 4;   out dx, al;   inc dx;   mov al, n;   out dx, al;  } } void vgasetplanemask(BYTE bymask) {  _asm{   mov dx, 0x3C4; /* sc[2]:Map Mask */   mov al, 2;   out dx, al;   inc dx;   mov al, bymask;   out dx, al;  } } double TestFps(TESTFUNC pfun, int nFlags) {  DWORD cntF;  DWORD tmrold, tmrcur, tmrover;  do{   cntF = 0;   tmrold = *pbiosclock;   tmrover = tmrold + (DWORD)(BIOSCLOCK_F * 10); /* 10s */   do{    if (nFlags & TESTFPS_WAITVR) WaitVR();    pfun(cntF);    cntF++;    tmrcur = *pbiosclock;   }while((tmrcur<tmrover)&&(tmrcur>=tmrold));   if (tmrcur < tmrold) continue;  }while(0);  return cntF / ((tmrcur-tmrold)/BIOSCLOCK_F); } void filloffscreen(int c) {  BYTE iP;  BYTE bymask;  vgasetwritemode(0);  memset(byVGA[0], -(1&(c>>0)), SCANSIZE_VGA);  memset(byVGA[1], -(1&(c>>1)), SCANSIZE_VGA);  memset(byVGA[2], -(1&(c>>2)), SCANSIZE_VGA);  memset(byVGA[3], -(1&(c>>3)), SCANSIZE_VGA);  bymask = 1;  for(iP=0; iP<SCR_PLANES; iP++)  {   vgasetplanemask(bymask);   repmovsd(LPOFFSCREEN, byVGA[iP], SCANSIZE_VGA/sizeof(DWORD));   bymask <<= 1;  } } void Test_C_V2S(DWORD iF) {  int iX, iY;  int iP;  WORD pscan;  BYTE far *pbyV;  BYTE *pbyS;  vgasetwritemode(0);  pscan = 0;  for(iY=0; iY<SCR_H; iY++)  {   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetreadplane(iP);    pbyS = byVGA[iP];    pbyV = MK_FP(SEG_VIDEO, pscan);    for(iX=0; iX<SCANSIZE_VGA; iX++)    {     *pbyS++ = *pbyV++;    }   }   pscan += SCANSIZE_VGA;  } } void Test_C_S2V(DWORD iF) {  int iX, iY;  BYTE iP;  WORD pscan;  BYTE far *pbyV;  BYTE *pbyS;  BYTE bymask;  vgasetwritemode(0);  memset(byVGA[0], -(1&(((int)iF)>>0)), SCANSIZE_VGA);  memset(byVGA[1], -(1&(((int)iF)>>1)), SCANSIZE_VGA);  memset(byVGA[2], -(1&(((int)iF)>>2)), SCANSIZE_VGA);  memset(byVGA[3], -(1&(((int)iF)>>3)), SCANSIZE_VGA);  pscan = 0;  for(iY=0; iY<SCR_H; iY++)  {   bymask = 1;   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetplanemask(bymask);    pbyS = byVGA[iP];    pbyV = MK_FP(SEG_VIDEO, pscan);    for(iX=0; iX<SCANSIZE_VGA; iX++)    {     *pbyV++ = *pbyS++;    }    bymask <<= 1;   }   pscan += SCANSIZE_VGA;  } } void Test_C_O2S(DWORD iF) {  int iX, iY;  BYTE iP;  BYTE far *pbyV;  BYTE *pbyS;  vgasetwritemode(0);  for(iY=0; iY<SCR_H; iY++)  {   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetreadplane(iP);    pbyS = byVGA[iP];    pbyV = LPOFFSCREEN;    for(iX=0; iX<SCANSIZE_VGA; iX++)    {     *pbyS++ = *pbyV++;    }   }  } } void Test_C_S2O(DWORD iF) {  int iX, iY;  BYTE iP;  BYTE far *pbyV;  BYTE *pbyS;  BYTE bymask;  vgasetwritemode(0);  memset(byVGA[0], -(1&(((int)iF)>>0)), SCANSIZE_VGA);  memset(byVGA[1], -(1&(((int)iF)>>1)), SCANSIZE_VGA);  memset(byVGA[2], -(1&(((int)iF)>>2)), SCANSIZE_VGA);  memset(byVGA[3], -(1&(((int)iF)>>3)), SCANSIZE_VGA);  for(iY=0; iY<SCR_H; iY++)  {   bymask = 1;   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetplanemask(bymask);    pbyS = byVGA[iP];    pbyV = LPOFFSCREEN;    for(iX=0; iX<SCANSIZE_VGA; iX++)    {     *pbyV++ = *pbyS++;    }    bymask <<= 1;   }  } } void Test_C_V2O(DWORD iF) {  int iX, iY;  WORD pscan;  BYTE far *pbyV;  BYTE far *pbyO;  vgasetwritemode(1);  vgasetplanemask(0xFF);  pscan = 0;  for(iY=0; iY<SCR_H; iY++)  {   pbyO = LPOFFSCREEN;   pbyV = MK_FP(SEG_VIDEO, pscan);   for(iX=0; iX<SCANSIZE_VGA; iX++)   {    *pbyO++ = *pbyV++;   }   pscan += SCANSIZE_VGA;  } } void Test_C_O2V(DWORD iF) {  int iX, iY;  WORD pscan;  BYTE far *pbyV;  BYTE far *pbyO;  filloffscreen(iF & 0xF);  vgasetwritemode(1);  vgasetplanemask(0xFF);  pscan = 0;  for(iY=0; iY<SCR_H; iY++)  {   pbyO = LPOFFSCREEN;   pbyV = MK_FP(SEG_VIDEO, pscan);   for(iX=0; iX<SCANSIZE_VGA; iX++)   {    *pbyV++ = *pbyO++;   }   pscan += SCANSIZE_VGA;  } } void Test_SB_V2S(DWORD iF) {  int iY;  int iP;  WORD pscan;  vgasetwritemode(0);  pscan = 0;  for(iY=0; iY<SCR_H; iY++)  {   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetreadplane(iP);    repmovsb(byVGA[iP], MK_FP(SEG_VIDEO, pscan), SCANSIZE_VGA/sizeof(BYTE));   }   pscan += SCANSIZE_VGA;  } } void Test_SB_S2V(DWORD iF) {  int iY;  BYTE iP;  WORD pscan;  BYTE bymask;  vgasetwritemode(0);  memset(byVGA[0], -(1&(((int)iF)>>0)), SCANSIZE_VGA);  memset(byVGA[1], -(1&(((int)iF)>>1)), SCANSIZE_VGA);  memset(byVGA[2], -(1&(((int)iF)>>2)), SCANSIZE_VGA);  memset(byVGA[3], -(1&(((int)iF)>>3)), SCANSIZE_VGA);  pscan = 0;  for(iY=0; iY<SCR_H; iY++)  {   bymask = 1;   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetplanemask(bymask);    repmovsb(MK_FP(SEG_VIDEO, pscan), byVGA[iP], SCANSIZE_VGA/sizeof(BYTE));    bymask <<= 1;   }   pscan += SCANSIZE_VGA;  } } void Test_SB_O2S(DWORD iF) {  int iY;  BYTE iP;  vgasetwritemode(0);  for(iY=0; iY<SCR_H; iY++)  {   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetreadplane(iP);    repmovsb(byVGA[iP], LPOFFSCREEN, SCANSIZE_VGA/sizeof(BYTE));   }  } } void Test_SB_S2O(DWORD iF) {  int iY;  BYTE iP;  BYTE bymask;  vgasetwritemode(0);  memset(byVGA[0], -(1&(((int)iF)>>0)), SCANSIZE_VGA);  memset(byVGA[1], -(1&(((int)iF)>>1)), SCANSIZE_VGA);  memset(byVGA[2], -(1&(((int)iF)>>2)), SCANSIZE_VGA);  memset(byVGA[3], -(1&(((int)iF)>>3)), SCANSIZE_VGA);  for(iY=0; iY<SCR_H; iY++)  {   bymask = 1;   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetplanemask(bymask);    repmovsb(LPOFFSCREEN, byVGA[iP], SCANSIZE_VGA/sizeof(BYTE));    bymask <<= 1;   }  } } void Test_SB_V2O(DWORD iF) {  int iY;  WORD pscan;  vgasetwritemode(1);  vgasetplanemask(0xFF);  pscan = 0;  for(iY=0; iY<SCR_H; iY++)  {   repmovsb(LPOFFSCREEN, MK_FP(SEG_VIDEO, pscan), SCANSIZE_VGA/sizeof(BYTE));   pscan += SCANSIZE_VGA;  } } void Test_SB_O2V(DWORD iF) {  int iY;  WORD pscan;  filloffscreen(iF & 0xF);  vgasetwritemode(1);  vgasetplanemask(0xFF);  pscan = 0;  for(iY=0; iY<SCR_H; iY++)  {   repmovsb(MK_FP(SEG_VIDEO, pscan), LPOFFSCREEN, SCANSIZE_VGA/sizeof(BYTE));   pscan += SCANSIZE_VGA;  } } void Test_SW_V2S(DWORD iF) {  int iY;  int iP;  WORD pscan;  vgasetwritemode(0);  pscan = 0;  for(iY=0; iY<SCR_H; iY++)  {   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetreadplane(iP);    repmovsw(byVGA[iP], MK_FP(SEG_VIDEO, pscan), SCANSIZE_VGA/sizeof(WORD));   }   pscan += SCANSIZE_VGA;  } } void Test_SW_S2V(DWORD iF) {  int iY;  BYTE iP;  WORD pscan;  BYTE bymask;  vgasetwritemode(0);  memset(byVGA[0], -(1&(((int)iF)>>0)), SCANSIZE_VGA);  memset(byVGA[1], -(1&(((int)iF)>>1)), SCANSIZE_VGA);  memset(byVGA[2], -(1&(((int)iF)>>2)), SCANSIZE_VGA);  memset(byVGA[3], -(1&(((int)iF)>>3)), SCANSIZE_VGA);  pscan = 0;  for(iY=0; iY<SCR_H; iY++)  {   bymask = 1;   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetplanemask(bymask);    repmovsw(MK_FP(SEG_VIDEO, pscan), byVGA[iP], SCANSIZE_VGA/sizeof(WORD));    bymask <<= 1;   }   pscan += SCANSIZE_VGA;  } } void Test_SW_O2S(DWORD iF) {  int iY;  BYTE iP;  vgasetwritemode(0);  for(iY=0; iY<SCR_H; iY++)  {   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetreadplane(iP);    repmovsw(byVGA[iP], LPOFFSCREEN, SCANSIZE_VGA/sizeof(WORD));   }  } } void Test_SW_S2O(DWORD iF) {  int iY;  BYTE iP;  BYTE bymask;  vgasetwritemode(0);  memset(byVGA[0], -(1&(((int)iF)>>0)), SCANSIZE_VGA);  memset(byVGA[1], -(1&(((int)iF)>>1)), SCANSIZE_VGA);  memset(byVGA[2], -(1&(((int)iF)>>2)), SCANSIZE_VGA);  memset(byVGA[3], -(1&(((int)iF)>>3)), SCANSIZE_VGA);  for(iY=0; iY<SCR_H; iY++)  {   bymask = 1;   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetplanemask(bymask);    repmovsw(LPOFFSCREEN, byVGA[iP], SCANSIZE_VGA/sizeof(WORD));    bymask <<= 1;   }  } } void Test_SD_V2S(DWORD iF) {  int iY;  int iP;  WORD pscan;  vgasetwritemode(0);  pscan = 0;  for(iY=0; iY<SCR_H; iY++)  {   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetreadplane(iP);    repmovsd(byVGA[iP], MK_FP(SEG_VIDEO, pscan), SCANSIZE_VGA/sizeof(DWORD));   }   pscan += SCANSIZE_VGA;  } } void Test_SD_S2V(DWORD iF) {  int iY;  BYTE iP;  WORD pscan;  BYTE bymask;  vgasetwritemode(0);  memset(byVGA[0], -(1&(((int)iF)>>0)), SCANSIZE_VGA);  memset(byVGA[1], -(1&(((int)iF)>>1)), SCANSIZE_VGA);  memset(byVGA[2], -(1&(((int)iF)>>2)), SCANSIZE_VGA);  memset(byVGA[3], -(1&(((int)iF)>>3)), SCANSIZE_VGA);  pscan = 0;  for(iY=0; iY<SCR_H; iY++)  {   bymask = 1;   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetplanemask(bymask);    repmovsd(MK_FP(SEG_VIDEO, pscan), byVGA[iP], SCANSIZE_VGA/sizeof(DWORD));    bymask <<= 1;   }   pscan += SCANSIZE_VGA;  } } void Test_SD_O2S(DWORD iF) {  int iY;  BYTE iP;  vgasetwritemode(0);  for(iY=0; iY<SCR_H; iY++)  {   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetreadplane(iP);    repmovsd(byVGA[iP], LPOFFSCREEN, SCANSIZE_VGA/sizeof(DWORD));   }  } } void Test_SD_S2O(DWORD iF) {  int iY;  BYTE iP;  BYTE bymask;  vgasetwritemode(0);  memset(byVGA[0], -(1&(((int)iF)>>0)), SCANSIZE_VGA);  memset(byVGA[1], -(1&(((int)iF)>>1)), SCANSIZE_VGA);  memset(byVGA[2], -(1&(((int)iF)>>2)), SCANSIZE_VGA);  memset(byVGA[3], -(1&(((int)iF)>>3)), SCANSIZE_VGA);  for(iY=0; iY<SCR_H; iY++)  {   bymask = 1;   for(iP=0; iP<SCR_PLANES; iP++)   {    vgasetplanemask(bymask);    repmovsd(LPOFFSCREEN, byVGA[iP], SCANSIZE_VGA/sizeof(DWORD));    bymask <<= 1;   }  } } int main(void) {  double fpsC_V2S, fpsC_S2V, fpsC_O2S, fpsC_S2O, fpsC_V2O, fpsC_O2V;  double fpsSB_V2S, fpsSB_S2V, fpsSB_O2S, fpsSB_S2O, fpsSB_V2O, fpsSB_O2V;  double fpsSW_V2S, fpsSW_S2V, fpsSW_O2S, fpsSW_S2O;  double fpsSD_V2S, fpsSD_S2V, fpsSD_O2S, fpsSD_S2O;  /* VGA 12h: 640*480*4bit */  vgasetvideomode(0x12);  /* C language */  fpsC_V2S = TestFps((TESTFUNC)Test_C_V2S, 0);  fpsC_S2V = TestFps((TESTFUNC)Test_C_S2V, 0);  fpsC_O2S = TestFps((TESTFUNC)Test_C_O2S, 0);  fpsC_S2O = TestFps((TESTFUNC)Test_C_S2O, 0);  fpsC_V2O = TestFps((TESTFUNC)Test_C_V2O, 0);  fpsC_O2V = TestFps((TESTFUNC)Test_C_O2V, 0);  /* movsb */  fpsSB_V2S = TestFps((TESTFUNC)Test_SB_V2S, 0);  fpsSB_S2V = TestFps((TESTFUNC)Test_SB_S2V, 0);  fpsSB_O2S = TestFps((TESTFUNC)Test_SB_O2S, 0);  fpsSB_S2O = TestFps((TESTFUNC)Test_SB_S2O, 0);  fpsSB_V2O = TestFps((TESTFUNC)Test_SB_V2O, 0);  fpsSB_O2V = TestFps((TESTFUNC)Test_SB_O2V, 0);  /* movsw */  fpsSW_V2S = TestFps((TESTFUNC)Test_SW_V2S, 0);  fpsSW_S2V = TestFps((TESTFUNC)Test_SW_S2V, 0);  fpsSW_O2S = TestFps((TESTFUNC)Test_SW_O2S, 0);  fpsSW_S2O = TestFps((TESTFUNC)Test_SW_S2O, 0);  /* movsd */  fpsSD_V2S = TestFps((TESTFUNC)Test_SD_V2S, 0);  fpsSD_S2V = TestFps((TESTFUNC)Test_SD_S2V, 0);  fpsSD_O2S = TestFps((TESTFUNC)Test_SD_O2S, 0);  fpsSD_S2O = TestFps((TESTFUNC)Test_SD_S2O, 0);  /* Text Mode */  vgasetvideomode(0x3);  /* out */  printf("[FPS: C]/n");  printf("Video  to System:%16.4f/n", fpsC_V2S);  printf("System to Video :%16.4f/n", fpsC_S2V);  printf("OffScr to System:%16.4f/n", fpsC_O2S);  printf("System to OffScr:%16.4f/n", fpsC_S2O);  printf("Video  to OffScr:%16.4f/n", fpsC_V2O);  printf("OffScr to Video :%16.4f/n", fpsC_O2V);  printf("[FPS: movsb]/n");  printf("Video  to System:%16.4f/n", fpsSB_V2S);  printf("System to Video :%16.4f/n", fpsSB_S2V);  printf("OffScr to System:%16.4f/n", fpsSB_O2S);  printf("System to OffScr:%16.4f/n", fpsSB_S2O);  printf("Video  to OffScr:%16.4f/n", fpsSB_V2O);  printf("OffScr to Video :%16.4f/n", fpsSB_O2V);  printf("[FPS: movsw]/n");  printf("Video  to System:%16.4f/n", fpsSW_V2S);  printf("System to Video :%16.4f/n", fpsSW_S2V);  printf("OffScr to System:%16.4f/n", fpsSW_O2S);  printf("System to OffScr:%16.4f/n", fpsSW_S2O);  printf("[FPS: movsd]/n");  printf("Video  to System:%16.4f/n", fpsSD_V2S);  printf("System to Video :%16.4f/n", fpsSD_S2V);  printf("OffScr to System:%16.4f/n", fpsSD_O2S);  printf("System to OffScr:%16.4f/n", fpsSD_S2O);  return 0; }