void datacrcerror8271()
{
i8271.result = 0x0E;
i8271.status = 0x18;
NMI8271();
fdctime = 0;
setspindown8271();
// printf("CRCdat 8271\n");
}
void headercrcerror8271()
{
i8271.result = 0x0C;
i8271.status = 0x18;
NMI8271();
fdctime = 0;
setspindown8271();
// printf("CRChead 8271\n");
}
void notfound8271()
{
i8271.result = 0x18;
i8271.status = 0x18;
NMI8271();
fdctime = 0;
setspindown8271();
// printf("Not found 8271\n");
}
void callback8271()
{
int diff=i8271.params[0]-i8271.curtrack[curdrive];
fdctime=0;
// printf("Callback 8271 - command %02X\n",i8271.command);
switch (i8271.command)
{
case 0x0B: /*Write*/
if (!i8271.phase)
{
i8271.curtrack[curdrive]=i8271.params[0];
disc_writesector(curdrive,i8271.cursector,i8271.params[0],(i8271.drvout&0x20)?1:0,0);
i8271.phase=1;
i8271.status=0x8C;
i8271.result=0;
NMI8271();
return;
}
i8271.sectorsleft--;
if (!i8271.sectorsleft)
{
i8271.status=0x18;
i8271.result=0;
NMI8271();
setspindown8271();
verify8271=0;
return;
}
i8271.cursector++;
disc_writesector(curdrive,i8271.cursector,i8271.params[0],(i8271.drvout&0x20)?1:0,0);
byte=0;
i8271.status=0x8C;
i8271.result=0;
NMI8271();
break;
case 0x13: /*Read*/
case 0x1F: /*Verify*/
if (!i8271.phase)
{
// printf("Seek to %i\n",i8271.params[0]);
i8271.curtrack[curdrive]=i8271.params[0];
// i8271.realtrack+=diff;
// disc_seek(0,i8271.realtrack);
// printf("Re-seeking - track now %i %i\n",i8271.curtrack,i8271.realtrack);
disc_readsector(curdrive,i8271.cursector,i8271.params[0],(i8271.drvout&0x20)?1:0,0);
i8271.phase=1;
return;
}
i8271.sectorsleft--;
if (!i8271.sectorsleft)
{
i8271.status=0x18;
i8271.result=0;
NMI8271();
setspindown8271();
verify8271=0;
return;
}
i8271.cursector++;
disc_readsector(curdrive,i8271.cursector,i8271.params[0],(i8271.drvout&0x20)?1:0,0);
byte=0;
break;
case 0x1B: /*Read ID*/
// printf("Read ID callback %i\n",i8271.phase);
if (!i8271.phase)
{
i8271.curtrack[curdrive]=i8271.params[0];
// i8271.realtrack+=diff;
// disc_seek(0,i8271.realtrack);
disc_readaddress(curdrive,i8271.params[0],(i8271.drvout&0x20)?1:0,0);
i8271.phase=1;
return;
}
// printf("Read ID track %i %i\n",i8271.params[0],i8271.sectorsleft);
i8271.sectorsleft--;
if (!i8271.sectorsleft)
{
i8271.status=0x18;
i8271.result=0;
NMI8271();
// printf("8271 : ID read done!\n");
setspindown8271();
return;
}
i8271.cursector++;
disc_readaddress(curdrive,i8271.params[0],(i8271.drvout&0x20)?1:0,0);
byte=0;
break;
case 0x23: /*Format*/
if (!i8271.phase)
{
i8271.curtrack[curdrive]=i8271.params[0];
disc_writesector(curdrive,i8271.cursector,i8271.params[0],(i8271.drvout&0x20)?1:0,0);
i8271.phase=1;
i8271.status=0x8C;
i8271.result=0;
NMI8271();
return;
}
if (i8271.phase==2)
{
i8271.status=0x18;
i8271.result=0;
NMI8271();
setspindown8271();
verify8271=0;
return;
}
disc_format(curdrive,i8271.params[0],(i8271.drvout&0x20)?1:0,0);
i8271.phase=2;
break;
case 0x29: /*Seek*/
i8271.curtrack[curdrive]=i8271.params[0];
// i8271.realtrack+=diff;
i8271.status=0x18;
i8271.result=0;
NMI8271();
// disc_seek(0,i8271.realtrack);
// printf("Seek done!\n");
setspindown8271();
break;
case 0xFF: break;
default: break;
printf("Unknown 8271 command %02X 3\n",i8271.command);
dumpregs();
exit(-1);
}
}
