Newsgroups: alt.cd-rom Path: cdrom.com!barrnet.net!sgiblab!swrinde!emory!sol.ctr.columbia.edu!usenet.ucs.indiana.edu!Melick-Richard.tuliptree.indiana.edu!rmelick From: rmelick@indiana.edu (Rick Melick) Subject: Re: HELP No CD-ROM in Enhence Message-ID: Lines: 107 Sender: news@usenet.ucs.indiana.edu (USENET News System) Nntp-Posting-Host: melick-richard.tuliptree.indiana.edu Organization: Indiana University References: <66.169.681.0N5C54CE@tabb.com> Date: Sun, 17 Apr 1994 17:08:37 GMT In article <66.169.681.0N5C54CE@tabb.com> dan.cote@tabb.com (Dan Cote) writes: >Subject: HELP No CD-ROM in Enhence >From: dan.cote@tabb.com (Dan Cote) >Date: Fri, 15 Apr 94 11:11:00 -0500 >I have a problem with Windows and my CD-ROM, I can >only read my CD-ROM in "Standard Mode". (win /s) >When I boot up Windows in "Enhence Mode:, I CAN NOT read my D drive >where the CD-ROM is located. Simple, the IRQ of your CD-ROM drive is conflicting with another IRQ. I don't own your brand of CD-ROM drive, so your startup files don't help me very much. I THINK THAT YOUR CONFIG.SYS FILE IS MISSING THE IRQ CHANNEL ON THE "I" SWITCH (/I:???) At least it is missing from your post. However, what would have been more helpful would have been a description of your system configuration. As an example of what is happening, let's say that your computer has two serial ports and that you have your mouse on COM1. COM1 uses IRQ4. Now let's say that you also have COM2 turned on, but nothing connected to it. COM2 uses IRQ3. Also lets say that you have your CD-ROM drive also using IRQ3. Now there is no chance if a conflict between COM2 and your CD-ROM drive in DOS, because COM2 will never call for an interrupt, bacause there is no device connected to it. So, DOS could care less that you have COM2 and your CD-ROM drive both using IRQ3. Windows, on the other hand, does care! Enhanced Mode Windows will not allow you to have both COM2 and your CD-ROM drive share an IRQ. The answer to your problem is to open up the computer and turn off(via removing a jumper) whatever is conflicting with the IRQ that you also have your CD-ROM drive set up to use. So, judging from your startup files, I would say that your computer is set up something like the following: COM2 (IRQ3) - ??? (vacant, modem, and/or cd-rom) COM1 (IRQ4) - Mouse LPT2 (IRQ5) - Sound Card LPT1 (IRQ7) - ??? (vacant, printer, and/or cd-rom) (IRQ9) - ??? (vacant) (IRQ10) - ??? (vacant) (IRQ11) - ??? (vacant, scanner) (IRQ12) - ??? (vacant, scanner) --- DMA0 - ??? (vacant) DMA1 - sound card DMA3 - ??? (vacant, scanner) DMA5 - CD-ROM DMA6 - ??? (vacant) DMA7 - ??? (vacant) You have your CD-ROM drive set up to use DMA5. Therefore, I assume then that your CD-ROM controller card is 16-bit. Remember, with a 16-bit card, you should also have access to IRQ9, IRQ10 and IRQ11. Check your CD-ROM documentation. But, since you didn't specify your system configuration, you are just going to have to look and see if your CD-ROM drive is conflicting with any other device. If so, then you are going to have to reconfigure your system. If there is no conflict (you do not have a printer or you do not have a modem) AND you to not have a 16-bit CD-ROM controller card, then you are going to have to remove a jumper on your I/O card to disable COM2 or LPT1 _AND_ change the DMA specification of your CD-ROM device driver (/T:5) in CONFIG.SYS from 5 to 0 or 3. Again, check your I/O card documentation. Also, if you have a scanner, your scanner and CD-ROM drive should not share IRQ11. Move the scanner to IRQ12. I hope this helps. At any rate, there is an IRQ conflict. DOS doesn't care, but Enhanced Mode Windows does. That is why you can only run Windows in standard mode (/s). Good Luck! Rick rmelick@indiana.edu