ide :)
Posted: Sun Aug 25, 2002 1:40 pm
I read that someone was interested in an ide example in C,
well here it is
(written by me, still messy 
)
it reads the first sec of my disk and puts it onto the screen...
well here it is
(written by me, still messy )it reads the first sec of my disk and puts it onto the screen...
Code: Select all
void initIDEdrive()
{
}
int readsec()
{
unsigned char c=0x0,c2=0x00;
unsigned short int b;
int i=0;
//
// 1F0 -> 1F7
// 170 -> 177 (the other disk)
//
//
// outportb(0x1F6,0x101+drive+head);
// [101] [01] [000]
//
// 1*2*2*2*2*2*2*2 = 128
// 1*2*2*2*2*2 = 32
// 1*2*2*2*2 = 16
// -------
// 176
//
// outportb(0x1F6,176);
outportb(0x1F6,176);
outportb(0x1F2,1); /* 1 sector to read */
outportb(0x1F3,1); /* sector nr */
outportb(0x1F4,0x00); /* cylinder low */
outportb(0x1F5,0x00); /* cylinder high */
outportb(0x1F7,0x20); /* read with retry */
c = 208;
while (c==208){ c = inportb(0x1F7); }
printf("\n--------\n");
for (i=0; i<512; i++)
{
b = inportdd(0x1F0);
asm volatile("movw %%ax,%%bx"::"b" (b));
asm volatile("mov %%al,%%bh":"=b" (c));
asm volatile("mov %%ah,%%bl":"=b" (c2));
putc(c);
putc(c2);
// buf[i] = c;
// buf[i+2] = c2;
}
printf("\n--------\n");
// return * buf;
}