中国DOS联盟

```c
// struct REGPACK reg;

reg.r_ax=0x1130;
reg.r_bx=reg_bx;
int86(0x10,&reg);

return MK_FP(reg.r_es,reg.r_bp);
```

```c
// Get the starting address of the 8x8 character set
unsigned char* GetCharacterPoint()
{

unsigned short wSeg = 0;
unsigned short wOff = 0;

__asm push es
__asm push bp

__asm mov ax, 1130H
__asm mov bh, 03H // Get the starting address of the 8x8 font
__asm int 10h

__asm mov ax, bp
__asm pop bp // Very important, otherwise the program will crash
__asm mov wOff, ax

__asm mov ax, es
__asm mov wSeg, ax
__asm pop es

return ((unsigned char *)(unsigned long)MK_FP(wSeg, wOff));
}

Last edited by firstsail on 2010-11-8 at 10:02 ]
```

Uh, boss upstairs, I need C language, no inline assembly...

In C language, although you can declare register variables to use registers as much as possible for variables, bp is generally used to pass parameters. So even when using embedded assembly to use bp, you have to be very careful, otherwise the program is very easy to crash.