Tech Note 154 Detail

ScienceWorkshop cannot find SCSI ScienceWorkshop 750 interface on Win95.

Affected Products:


I am running Windows 95 and the ScienceWorkshop software scans for but can not find the 750 interface when it is plugged into the SCSI card. What can I do?

PASCO Solution:

Make sure that you have properly installed the SCSI card and that you have tried all of the general troubleshooting tips.

If you are still having problems:

  1. Check for device conflicts. To do this in Windows 95:
    • Check the Device Manager (Right click on My Computer and select Properties, then click on the Device Manager tab). Double click on the SCSI Controllers and then double click on the Adaptec card. It should pull up a general description. In the general description it should list whether the Device is working properly.
    • Next, click on the Resources tab. Note the Input/Output Range and the Interrupt Request. At the bottom, check to see if there are any conflicts. Each hardware device needs a unique IRQ and I/O range. The card comes preset for IRQ 11 and I/O 0340.
    • Click OK to exit the Resources tab. In the Device Manager double-click on "computer". Computer should be the first on the list. This should bring up a list of the devices on your computer as well as the IRQ settings that are being used by these devices.
    • The Adaptec card can only use IRQ 9,10,11, or 12 so check to see if any of these settings are available. If a setting is available, it will not be listed or it will not have a hardware device associated with the number. The card comes with IRQ 11 by default so you may want to check if IRQ 11 is availabe first so you will not have to move the jumper.
    • If the only available IRQ is marked as an IRQ holder for PCI steering, you should may be able to make BIOS changes to free the IRQ.
    • Click on the I/O bullet to see the I/O resources. The Adaptec card can only use I/O 0140 or 0340. Exit the I/O resources by clicking OK.
    • If you need to change the card to an available IRQ or I/O, remove the card in the Device Manager by clicking on the plus sign next to SCSI Controllers, and selecting the Adaptec SCSI card, and then clicking on the REMOVE button. Power down the computer and disconnect the power.
    • You will need to remove the card from your computer and move the jumper(s) to the corresponding setting. Be sure no other device is using the IRQ you have the jumper on the card set to, and be sure you are reading the IRQ correctly. The very top jumper determines the I/O: on is 0140, off is 0340. The second jumper determines the IRQ. The top IRQ jumper position is IRQ 12 and the bottom IRQ jumper position is IRQ 9. Consult the Adaptec instruction sheet for additional information.
    • After you have correctly changed the jumpers, return the card to the slot in your computer. Make sure that the interface is turned on and then turn on the computer.
    • Use the Windows 95 "Add New Hardware" Wizard to install the SCSI card.
  2. Get the latest version of the driver files. If you accidentally installed the EZ-Lite software from disk, or you have tried the above troubleshooting techniques and the interface is still not found, there may be a driver problem.
    • The driver for the card is named Sparrow.mpd and should have been loaded when you used the Add New Hardware feature of Windows 95 to install the SCSI card. If, after you have used the Add New Hardware feature, the software still doesn't recognize the interface, you may get files from the Adaptec website.
    • The two files you need are WIN95MPD.EXE and ASPI32.EXE.
    • When you have downloaded the files, double click on the file WIN95MPD.EXE. This file will decompress several files into the directory in which it resides. The decompressed file for the Adaptec SCSI card is titled "sparrow.mpd".
    • Copy this file into the directory where your current sparrow.mpd resides. Normally you can find it in the following directory: C:\WINDOWS\SYSTEM\IOSUBSYS\ If there is an existing sparrow.mpd file do not replace it, just rename it to sparrow2.mpd.
    • Double click on the ASPI32.exe file to execute it. It will update your ASPI layer.
    • Turn your interface and computer off and then turn your interface on and then reboot your computer.
  3. If the software still does not find the interface, contact Technical Support for additional troubleshooting tips.

Creation Date: 01/1/2000
Last Modified: 11/18/2014
Mod Summary: