//rdiskc.c
#include <stdio.h>
#include <math.h>
#include <alloc.h>
#include <string.h>
#ifndef NULL
#define NULL 0
#endif
typedef struct DiskAddressPacket{
char PacketSize;
char Reserved;
unsigned int BlockCount;
unsigned long BufferAddr;
int BlockNum[4];
}*DAP,DiskAddrPack;
extern void DREAD(DAP);
int main(int argc,char *argv[]){
int length,i=0,j=0,k=0,line=16;
unsigned char buffer[512];
DAP psi=(DAP)malloc(sizeof(DiskAddrPack));
if(argc==2&&!strcmp(argv[1],"/?")){
printf("\nbdexpen sector(0x,for 4 section) [line]\n\tline the line on show(must be 16 or 32)");
return 0;
}
if(argc!=5&&argc!=6)
return -1;
for(argv++,i=0;i<4;i++){
length=strlen(*argv);
if(length!=4)
return -2;
for(j=0;j<4;j++){
if((*argv)[j]>='0'&&(*argv)[j]<='9')
(*argv)[j]-='0';
else if((*argv)[j]>='a'&&(*argv)[j]<='f')
(*argv)[j]=(*argv)[j]-'a'+10;
else if((*argv)[j]>='A'&&(*argv)[j]<='F')
(*argv)[j]=(*argv)[j]-'A'+10;
else return -3;
}
psi->BlockNum[3-i]=(int)(*argv)[0]*16*16*16+(int)(*argv)[1]*16*16+(int)(*argv)[2]*16+(int)(*argv)[3];
argv++;
}
if(argc==6){
length=strlen(*argv);
for(j=0,k=0,line=0;j<length;){
if((*argv)[k]<48||(*argv)[k]>57)
return -4;
line+=((int)(*argv)[k++]-48)*(int)(pow(10,--length));
}
printf("%d\n",line);
if(line!=16&&line!=32)
line=16;
}
psi->PacketSize=16;
psi->Reserved=0;
psi->BlockCount=1;
psi->BufferAddr=(unsigned long)buffer;
DREAD(psi);
for(j=0;j<512/line;j++){
printf("%3x:",j*line);
for(k=0;k<line;k++){
printf("%4x",buffer[j*line+k]);
if(k==7||k==15&&line==32||k==23)
printf(" -");
}
printf("\t ");
for(k=0;k<line;k++){
if((buffer[j*line+k])<=128&&buffer[j*line+k]!='\n'&&buffer[j*line+k]!='\t')
printf("%c",buffer[j*line+k]);
else printf("\.");
}
printf("\n");
}
free(psi);
return 0;
}
//rdiska.asm
.model small
.data
.code
public _DREAD
_DREAD proc
push bp
mov bp,sp
push ds
push si
mov ah,42h
mov dl,80h
mov si,word ptr [bp+4]
int 13h
pop si
pop ds
pop bp
ret
_DREAD endp
end
编译连接后可以执行，可以像dos命令一样调用，不过没有写使用方法，大概就是把你要读的扇区的线性地址用16位分4段每段4位用空格隔开输入。另外还设置了一个16行/32行显示的切换开关第5个参数。
