private void execIOReadSectorByIndex() {
SectorData sector = null;
FloppyDiskDrive drive = this.executingDrive;
if (drive != null) {
sector = drive.readSectorByIndex(getArgHead(), this.sectorIdRec - 1);
}
drive = getExecutingDrive();
if (drive != null) {
if (sector != null) {
this.curSector = sector;
this.curSectorReader = sector.reader();
this.remainBytes = this.dataLen;
if (this.curCmd == Command.READ_TRACK) {
setByteReadable();
} else {
this.sectorIdCyl = sector.getCylinder();
this.sectorIdHead = sector.getHead();
this.sectorIdRec = sector.getSectorNum();
this.sectorIdSizeCode = sector.getSizeCode();
if (sector.isEmpty()) {
this.statusReg1 |= ST1_MISSING_ADDRESS_MARK;
this.statusReg2 |= ST2_MISSING_DATA_ADDRESS_MARK;
}
stopExecution();
}
} else {
this.statusReg0 |= ST0_ABNORMAL_TERMINATION;
if (this.sectorIdRec == 1) {
this.statusReg1 |= ST1_NO_DATA;
this.statusReg1 |= ST1_MISSING_ADDRESS_MARK;
} else {
this.statusReg1 |= ST1_END_OF_CYLINDER;
}
stopExecution();
}
}
}
private void execIOReadSectorByID() {
boolean cmAbort = false;
SectorData sector = null;
FloppyDiskDrive drive = this.getExecutingDrive();
if (drive != null) {
AbstractFloppyDisk disk = drive.getDisk();
if (disk != null) {
int head = getArgHead();
if (disk.supportsDeletedSectors()) {
int startIdx = getSectorIndexByCurHeadPos(drive);
if (startIdx >= 0) {
boolean loop = true;
int endIdx = -1;
int curIdx = startIdx;
while (loop && ((curIdx < endIdx) || (endIdx < 0))) {
sector = drive.readSectorByIndex(head, curIdx);
if ((sector == null) && (startIdx > 0)) {
// zum Spuranfang springen
endIdx = startIdx;
startIdx = 0;
curIdx = 0;
} else {
loop = false;
if (sector != null) {
if (this.curCmd == Command.READ_DELETED_DATA) {
if (!sector.isDeleted()) {
this.statusReg2 |= ST2_CONTROL_MARK;
if ((this.args[0] & ARG0_SK_MASK) != 0) {
curIdx++;
loop = true;
} else {
cmAbort = true;
}
}
} else {
if (sector.isDeleted()) {
this.statusReg2 |= ST2_CONTROL_MARK;
if ((this.args[0] & ARG0_SK_MASK) != 0) {
curIdx++;
loop = true;
} else {
cmAbort = true;
}
}
}
if (!loop
&& ((sector.getCylinder() != this.sectorIdCyl)
|| (sector.getHead() != this.sectorIdHead)
|| (sector.getSectorNum() != this.sectorIdRec)
|| (sector.getSizeCode() != this.sectorIdSizeCode))) {
curIdx++;
loop = true;
}
}
}
}
}
} else {
sector =
drive.readSectorByID(
head,
0,
this.sectorIdCyl,
this.sectorIdHead,
this.sectorIdRec,
this.sectorIdSizeCode);
}
}
}
drive = getExecutingDrive();
if (drive != null) {
if (sector != null) {
if (sector.checkError()) {
this.statusReg0 |= ST0_ABNORMAL_TERMINATION;
this.statusReg1 |= ST1_DATA_ERROR;
this.statusReg2 |= ST2_DATA_ERROR_IN_DATA_FIELD;
}
this.curSector = sector;
this.curSectorReader = sector.reader();
this.remainBytes = this.dataLen;
startIOReqTimer();
} else {
this.statusReg0 |= ST0_ABNORMAL_TERMINATION;
if (!cmAbort) {
if ((this.sectorIdCyl == this.args[2])
&& (this.sectorIdHead == this.args[3])
&& (this.sectorIdRec == this.args[4])) {
this.statusReg1 |= ST1_NO_DATA;
this.statusReg1 |= ST1_MISSING_ADDRESS_MARK;
} else {
this.statusReg1 |= ST1_END_OF_CYLINDER;
}
}
stopExecution();
}
}
}