www.pudn.com > cdrom.zip > CDROM.CPP
#include
#include
#include
#include
class CD_ROM
{
private:
unsigned char* dev_name;
unsigned playing;
unsigned cd;
unsigned opened;
unsigned char continuous;
void is_open();
void no_cd();
void is_playing();
public:
CD_ROM();
unsigned first_track;
unsigned last_track;
unsigned state;
unsigned sector[30];
unsigned offset[30];
unsigned track_time[30];
void init();
void status();
void reset();
void open();
void close();
void play(unsigned char);
void stop();
void get_tracks();
void disk_info();
unsigned char* name()
{ return dev_name; }
unsigned first()
{ return first_track; }
unsigned last()
{ return last_track; }
};
CD_ROM::CD_ROM()
{
playing=cd=opened=0;
}
void CD_ROM::init()
{
unsigned char num=0,h;
asm{push ds
push di
mov ah,0x0048
mov bx,0x0001
int 0x0021
mov es,ax
mov bx,0
mov ax,0x1501
int 0x002f
lds di,es:[bx+1]
add di,10
mov cx,9
}
loop:
asm{mov bh,ds:[di]
mov h,bh
}
dev_name[num]=h;
num++;
asm{
inc di
dec cx
cmp cx,0
jne loop
}
dev_name[8]=0x0000;
asm{mov ah,0x0049
int 0x0021
pop di
pop ds
}
}
void CD_ROM::get_tracks()
{
unsigned int dev_info_low,dev_info_high;
unsigned char* buffer=name();
unsigned int mins,secs;
char track,l;
char dev_info[2];
unsigned segm,off;
off=FP_OFF(dev_name);
segm=FP_SEG(dev_name);
asm{push ds
push di
mov ah,0x0048
mov bx,0x0001
int 0x0021
mov es,ax
mov bx,0
mov ax,0x1501
int 0x002f
mov ax,0x3c00
mov cx,0x0000
mov dx,segm
mov ds,dx
mov dx,off
int 0x0021
mov bx,ax
mov cx,0x0064
mov ax,es
mov ds,ax
mov dx,0
mov di,dx
mov byte ptr ds:[di],0x000a
mov ax,0x4402
int 0x0021
mov dx,ds:[di+1]
mov byte ptr dev_info[0],dl
mov byte ptr dev_info[1],dh
mov ah,0x0049
int 0x0021
pop di
pop ds
}
first_track=dev_info[0];
last_track=dev_info[1];
l=last_track;
asm{push ds
push di
mov ah,0x0048
mov bx,0x0001
int 0x0021
mov es,ax
mov bx,0
mov ax,0x1501
int 0x002f
mov ax,0x3c00
mov cx,0x0000
lds dx,buffer
int 0x0021
mov bx,ax
}
for (track=1;track<=l;track++)
{
asm{push bx
mov cx,0x0064
mov ax,es
mov ds,ax
mov dx,0
mov di,dx
mov dl,track
mov byte ptr ds:[di],0x000b
mov byte ptr ds:[di+1],dl
xor dx,dx
mov ax,0x4402
int 0x0021
mov dx,ds:[di+2]
mov word ptr dev_info_low,dx
mov dx,ds:[di+4]
mov word ptr dev_info_high,dx
}
offset[track-1]=dev_info_low;
sector[track-1]=dev_info_high;
asm{pop bx}
}
asm{mov ah,0x0049
int 0x0021
pop di
pop ds
}
for (track=1;track200) secs=secs-200;
track_time[track-1]=mins*4500+secs*75;
}
track_time[l-1]=0xffff;
}
void CD_ROM::disk_info()
{
unsigned segm,off,sectors,sectors_1;
off=FP_OFF(dev_name);
segm=FP_SEG(dev_name);
asm{push ds
push di
mov ah,0x0048
mov bx,0x0001
int 0x0021
mov es,ax
mov bx,0
mov ax,0x1501
int 0x002f
mov ax,0x3c00
mov cx,0x0000
mov dx,segm
mov ds,dx
mov dx,off
int 0x0021
mov bx,ax
mov cx,0x0064
mov ax,es
mov ds,ax
mov dx,0
mov di,dx
mov byte ptr ds:[di],0x0008
mov ax,0x4402
int 0x0021
mov dx,ds:[di+1]
mov sectors,dx
mov dx,ds:[di+3]
mov sectors_1,dx
mov ah,0x0049
int 0x0021
pop di
pop ds
}
}
void CD_ROM::status()
{
unsigned char* buffer=name();
unsigned drive_state;
asm{push ds
push di
mov ah,0x0048
mov bx,0x0001
int 0x0021
mov es,ax
mov ax,0x3c00
mov cx,0x0000
lds dx,buffer
int 0x0021
mov bx,ax
mov ax,es
mov ds,ax
mov ax,0x4402
mov cx,5
mov dx,0
mov di,dx
mov byte ptr ds:[di],6
int 0x0021
mov dx,ds:[di+1]
mov drive_state,dx
mov ah,0x0049
int 0x0021
pop di
pop ds
}
state=drive_state;
is_open();
no_cd();
is_playing();
}
void CD_ROM::is_open()
{
unsigned temp=state;
asm{test temp,1
jz closed;
}
opened=1;
cout << "CD door is open.\n";
return;
closed:
opened=0;
cout << "CD door is closed.\n";
}
void CD_ROM::no_cd()
{
unsigned temp=state;
asm{test temp,100000000000b
jnz empty
}
cd=1;
cout << "There is a CD in the drive.\n";
return;
empty:
cd=0;
cout << "There is no CD in the drive.\n";
}
void CD_ROM::is_playing()
{
unsigned temp=state;
asm{test temp,10000000000b
jz playing_1
}
playing=0;
cout << "The CD is not playing.\n";
return;
playing_1:
playing=1;
cout << "The CD is not playing.\n";
}
void CD_ROM::open()
{
unsigned char* buffer=name();
asm{push ds
push di
mov ah,0x0048
mov bx,0x0001
int 0x0021
mov es,ax
mov ax,0x3c00
mov cx,0x0000
lds dx,buffer
int 0x0021
mov bx,ax
mov ax,es
mov ds,ax
mov ax,0x4403
mov cx,1
mov dx,0
mov di,dx
mov byte ptr ds:[di],0
int 0x0021
mov ah,0x0049
int 0x0021
pop di
pop ds
}
}
void CD_ROM::reset()
{
unsigned char* buffer=name();
asm{push ds
push di
mov ah,0x0048
mov bx,0x0001
int 0x0021
mov es,ax
mov ax,0x3c00
mov cx,0x0000
lds dx,buffer
int 0x0021
mov bx,ax
mov ax,es
mov ds,ax
mov ax,0x4403
mov cx,1
mov dx,0
mov di,dx
mov byte ptr ds:[di],2
int 0x0021
mov ah,0x0049
int 0x0021
pop di
pop ds
}
}
void CD_ROM::close()
{
unsigned char* buffer=name();
asm{push ds
push di
mov ah,0x0048
mov bx,0x0001
int 0x0021
mov es,ax
mov ax,0x3c00
mov cx,0x0000
lds dx,buffer
int 0x0021
mov bx,ax
mov ax,es
mov ds,ax
mov ax,0x4403
mov cx,1
mov dx,0
mov di,dx
mov byte ptr ds:[di],5
int 0x0021
mov ah,0x0049
int 0x0021
pop di
pop ds
}
}
void CD_ROM::play(unsigned char track)
{
unsigned int upper=sector[track-1],lower=offset[track-1],length;
length=track_time[track-1];
asm{push ds
push di
mov ah,0x0048
mov bx,0x0002
int 0x0021
mov es,ax
mov bx,1
mov ax,0x1501
int 0x002f
mov bx,0
mov dx,lower
mov byte ptr es:[bx],0x0016
mov byte ptr es:[bx+2],0x0084
mov byte ptr es:[bx+0x000d],0x0001
mov word ptr es:[bx+0x000e],dx
mov dx,upper
mov word ptr es:[bx+0x0010],dx
mov dx,length
mov word ptr es:[bx+0x0012],dx //here is the length
mov word ptr es:[bx+0x0014],0x0000 //not sure of actual parameters
mov ax,0x1510
mov cx,0x0003
int 0x002f
mov ah,0x0049
int 0x0021
pop di
pop ds
}
}
void CD_ROM::stop()
{
asm{push ds
push di
mov ah,0x0048
mov bx,0x0001
int 0x0021
mov es,ax
mov bx,1
mov ax,0x1501
int 0x002f
mov bx,0
mov byte ptr es:[bx],0x000d
mov byte ptr es:[bx+2],0x0085
mov ax,0x1510
mov cx,0x0003
int 0x002f
mov ah,0x0049
int 0x0021
pop di
pop ds
}
}