WARNING: The following content that I have posted requires not just computer experience, but computer knowledge. You'll be installing a Non-PnP device, and setting those up is tough. If you know what IRQs and I/O Addresses are, then you're good. GOOD LUCK!!!
I DID IT!!! Guys, the easiest way to install ANY external device to the Zip Zoom (otherwise known as an Adaptec AHA-1502, not AVA-1502E), all you need to do (I did it on Windows 2000, so it should work on XP) is to first find any IRQs between nine and eleven open. The I/O address is most likely free (unless you have a lot of gunk installed in your PCI/ISA slots). Just go to Start, Settings, Control Panel, Add/Remove Hardware, select the "Add a new device" option, Next, select the "No, I want to select the hardware from a list" option, next, scroll down and select "SCSI and RAID Controllers", and next. Whew that's a mouthful. In this next window, there's two lists. Make sure you have "Adaptec" selected in the list to the left. In the list to the right, click on "Adaptec AHA-1502 SCSI Host Adapter," and click next. Now you get an error message. Don't worry, it's a good message. Just click ok and another box pops up. In there enter the IRQ and I/O Address values. The I/O address value should already be suggested. Just click ok IF AND ONLY IF there is no conflicting device. When you're done overall you should get no conflicts from either I/O Address or IRQ. Just keep clicking next from there and finish. It'll ask you to restart and bam you're done. Now, there's one problem I encountered, but with common sense, solved. Make sure you set your drive's ID to 1 instead of something like 5 or 6. What happens is that Windows sees just extra copies of the drive than needed and is really annoying (plus, if you have a lot of hard drives, it hogs up drive letters). I don't know if this'll happen when you have it set to 2 when you have another SCSI device that's set to 1, but if it's a standalone keep it at 1. Now, I really doubt if Windows 9x (yes, Windows ME is part of Windows 9x) supports this SCSI adapter by default. If it's not in the list of SCSI adapters, just download the driver (I'm not gonna explain how to install drivers...only reason I said all this is because for all you that know what drivers are but don't know IRQs and stuff, this is to help you out). Just download the driver from http://www.driverguide.com/ and click on "Driver List" to the left. These guys have drivers for everything, including the adapter (trust me, I checked). You have to sign up to use it (it's free, and it's DEFINITELY worth the hassle) Anyhow, I hope this info helps you guys out!
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It said "Windows XP Required," so I used Windows 2000.
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Bill