HP 40gs HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010.p - Page 242
Time out
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Normally the result of this will be a series of small pop up boxes on the PC showing the progress of the file transfer. Since most objects on the calculator are small the pop ups don't tend to stay visible very long. Some aplets will take up to 45 seconds to transmit if they contain large amounts of data or if they contain linked programs. Don't unplug until you are SURE that everything has been transmitted. Sometimes there is an extended pause between files. If this is the first time that you have used the folder you chose then you will see the screen shown right. Two small files are normally created in the folder to hold a record of what has been stored there. This screen is simply asking if it is alright to create these files. The files are called HP39DIR.CUR and HP39DIR.000. They should not be edited or interfered with in any way or the record contained in them may be damaged or lost. During the file transfer process the calculator will also show various pop up boxes to show progress. Their contents depends on what is being transmitted. The filename that is used on the PC to store the object is normally contracted as shown in the screen to the right. This is not important since, thanks to those "two small files" mentioned in the previous paragraph, the full name will be recorded and restored when transferred back to the calculator. The reason for the contraction is that the original hp 38g from which the hp 39gs and hp 40gs are derived was released for an earlier version of Windows that did not allow long filenames. This has never been changed on later models. Time out If you see a message saying that there has been a "Time-out", it means that communication with the PC has been lost. This can be due to low batteries. Communication with the PC is very power intensive and problems may occur before the low battery indicator lights up at the top of the calculator screen. It can also be due to problems with the communications software. The USB connection seems to be quite unstable and you may find that you need to close the program and re-start it at times to restore communications. 242