private void startReadTrack() {
setExecutionMode();
clearRegs012();
this.sectorIdCyl = this.args[2];
this.sectorIdHead = this.args[3];
this.sectorIdRec = 1;
this.sectorIdSizeCode = this.args[5];
this.curSectorReader = null;
this.curSectorIdx = 0;
this.tcEnabled = true;
boolean done = false;
FloppyDiskDrive drive = getArgDrive();
if (drive != null) {
if (drive.isReady()) {
this.dataLen = getArgDataLen();
this.executingDrive = drive;
startIOTask(
IOTaskCmd.READ_SECTOR_BY_INDEX,
Math.max(this.tStatesPerRotation - this.tStateRotationCounter, 0));
done = true;
}
}
if (!done) {
this.statusReg0 |= ST0_ABNORMAL_TERMINATION;
this.statusReg0 |= ST0_EQUIPMENT_CHECK;
this.statusReg0 |= ST0_NOT_READY;
this.statusReg0 |= (this.args[1] & HEAD_DRIVE_MASK);
stopExecution();
}
}
private int getSectorIndexByCurHeadPos(FloppyDiskDrive drive) {
int idx = -1;
if (drive != null) {
AbstractFloppyDisk disk = drive.getDisk();
if (disk != null) {
int head = getArgHead();
int cyl = drive.getCylinder();
int spc = disk.getSectorsOfCylinder(cyl, head);
int tpr = this.tStatesPerRotation;
if ((spc > 0) && (tpr > 0) && (head < disk.getSides()) && (cyl < disk.getCylinders())) {
idx = Math.round((float) this.tStateRotationCounter / (float) tpr * (float) spc);
if (idx >= spc) {
idx = spc - 1;
}
}
if (idx < 0) {
idx = 0;
}
}
}
return idx;
}
private void startIOReqTimer() {
this.tStatesTillIOReq = Math.min(this.tStatesPerMilli / 100, 1);
}