JBCL2.0 compiled for Java 2

Does anyone know if JBCL2.0 supports Java 2?
null

I have the feeling it's not working. A simple applet (runs
even in MSIE 4 with MVM 3167) which has a tableDataSet and
some other database related controls is not working with the
Java plugin (for Java 2.0), giving an error of "unrecognized
class format" or something like this.
Alexander
null

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    if (b < 0) {
    if (XModem.debug) {
    System.out.println("Time out... NAK'ing");
    out.write(NAK);
    continue recv;
    else {
    buffer[i] = (byte) (b & 0xFF);
    break;
    int type = buffer[0] & 0xff; // either SOH or EOT
    if (type == EOT) {
    if (XModem.debug) {
    System.out.println("EOT!");
    out.write(ACK);
    break;
    int bn = buffer[1] & 0xff; // block number
    int bnc = buffer[2] & 0xff; // one's complement to block #
    if (
    (bn != ebn) && (bn != (ebn - 1)) ||
    (bn + bnc != 255)) {
    if (XModem.debug) {
    System.out.println("NAK'ing type = " + type + " bn = " + bn +
    " ebn = " +
    ebn + " bnc = " + bnc);
    out.write(NAK);
    continue recv;
    byte chksum = buffer[ (buffer.length - 1)];
    byte echksum = 0;
    for (int i = 3; i < (buffer.length - 1); i++) {
    echksum = (byte) ( ( (echksum & 0xff) + (buffer[i] & 0xff)) & 0xff);
    if (chksum != echksum) {
    out.write(NAK);
    continue recv;
    out.write(ACK);
    if (ebn == 255) {
    ebn = 0;
    else {
    ebn++;
    break;
    // We got our block, now save it in our data buffer.
    data = new byte[bs];
    for (int i = 3; i < (buffer.length - 1); i++) {
    data[(i - 3)] = buffer;
    dataPos = 0;
    public synchronized int read() throws IOException {
    // If at the end of our buffer, refill it.
    if (dataPos == bs) {
    try {
    getNextBlock();
    catch (IOException e) {
    throw new IOException();
    // If we're still at end of buffer, say so.
    if ( dataPos == bs) {
    return -1;
    int d = data[dataPos];
    if (d == EOF)
    return -1;
    dataPos++;
    return d;
    * A wrapper around the native read() call that provides the ability
    * to timeout if no data is available within the specified timeout value.
    * @param timeout timeout value in seconds
    * @throws IOException
    * @return int an integer representing the byte value read.
    private int readTimed(int timeout) throws IOException {
    long start = System.currentTimeMillis();
    for (; ; ) {
    if (in.available() > 0) {
    return (in.read());
    try {
    Thread.sleep(10);
    catch (InterruptedException ex) {
    //if (System.currentTimeMillis() - start > timeout * 1000) {
    if (System.currentTimeMillis() - start > timeout * 5000) {
    return -1;
    Here was the output...
    Original file:
    (Commodore CBM SEQ file exported to PC using DirMaster)
    ��
    � �
    � ��� �� �� ��� ��
    � �� �� ���� �� ��� ��
    � ��� ����������������������������������������������
    �� ����� ������� ����� �� ����� ������ ����� ���
    � �� ������ ������ ��� ��� �� ��� ���� �� ������
    � � ���
    ����
    � � ��OWERED BY �OLOR 64 ��� V8
    �UNNING �ETWORK64 V1.26A
    �
    �UPPORTING 38400 �AUD �ATES
    �����/����/�������
    �
    �ESTING �CHO-�ET V1 BETA
    �
    �EATURING �ESSAGES, �ILES,
    �ET�AIL, AND �NLINE �AMES!
    �YS�P: � � � � � � � � �
    �
    �RESS ANY KEY TO LOGIN\C�
    The result when the file was uploaded and received by my XServer:
    ? ? ??OWERED BY ?OLOR 64 ??? V8
    ?UNNING ?ETWORK64 V1.26A
    ?UPPORTING 38400 ?AUD ?ATES
    ?ESTING ?CHO-?ET V1 BETA
    ?EATURING ?ESSAGES, ?ILES,
    ?ET?AIL, AND ?NLINE ?AMES!
    ?YS?P: ? ? ? ? ? ? ? ? ?
    ?RESS ANY KEY TO LOGIN\C?
    The result is different!
    Can someone help me along here... I have been trying to figure out how to do this for approx. a year or so... it has been a very slow process.
    I could use a guru to help me out so I can write the upload and download routines for my Commodore BBS PETSCII Emulation Server.
    Visit http://www.retrogradebbs.com for details.
    Thanks.
    Please help out a dedicated developer who is in over his head...
    -Dave

    Ok. Fair enough. What about general information about Xmodem. This is a hard project because of how obscure the legacy technology is that I am having to implement using Java and MySQL.
    I have two major issues which I have to figure out how to troubleshoot and debug, if possible.
    1. The 23+ blocks exception when a file is being received
    2. The exception which is thrown immediately if I try to receive a binary file instead of an ASCII file.
    I read that telnet is a 7-bit technology and that is why Xmodem, which is an 8-bit technology is not that popular as a viable protocol via telnet, whereas Kermit is, since it was developed for 7-bit systems, i.e. mainframes and minicomputers.
    Is this correct?
    If that is the case, why does www.serio.com have a viable X-Y-ZModem library available (for several hundred $$$ of course) which can be used with both RS-232 serial ports and TCP socket ports? Obviously, it can be done. They are the ONLY company with this library for sale for Java to do this. I cannot justify that $$$ amount for a mere hobby (writing the BBS emulation server for supporting Commodore PETSCII (CG) callers via CGTerm or a native C-64 terminal program using Jim Brain's TCPSER middleware, which emulates a Hayes modem via telnet for telBBSing/retrocomputing.
    I really want to learn how to implement a file transfer protocol, since back in the 80s, I used Xmodem, Punter, Y/Z Modem, etc., a lot to upload and download files via modem at baud rates of 2400, 14.4, 19.2, and 38.4, respectively.
    It's fun to learn how the old skool gurus of telecommunications technology did it. It is one thing to run a BBS which supports these technologies and features, and it is an entirely other thing to learn how to design and develop them yourself for implementation into a project such as I taken on.
    It CAN be done. It WILL be done. However, I have just started my exhaustive research on how it needs to be done. I have read up as much as I could on XModem by Ward C., the father of the protocol.
    But, I have no information to help me figure out why the communications are acting as they do so far.
    Can someone please download the xserver.zip file on my website at:
    www.retrogradebbs.com/projects/xserver.zip
    Compile it. Run it. Connect using HyperTerminal, Netrunner, or another telnet terminal emulation program which supports Xmodem file transfers using WinSock.
    See what happens. With finals due in the next two days, this project will have to be put on hold until after I submit my two final projects.
    If anyone knows what needs to be done to support both ASCII and BINARY file transfers via Xmodem via a socket instead of a modem with RTS/CTS hardware flow control, please respond.
    I know for a fact that this can be done.
    - Dave

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