I have an older 486sx machine which has a controller card for the HDD and FD. I am trying to add an IDE CD-Rom. I added a second IDE controller card in an ISA slot. Connected the cd-rom to the IDE interface on the second card. Down loaded and installed CD Drivers from Mitsumi web site. When I boot up, the system tells me unable to locate cd rom device. The CD jumper is set to master. Variable 1 is the jumper settings on the second card. J3 is IDE , J4 is IDE Address, I have J3 enabled and J4 disabled. If I enable J4 the computer tries to boot from the floppy and by-passes the HDD. Variable 2 is BIOS setting for the second card which I do not know how to see them. Do I need to set an address, IRQ, etc. for the second card. If so how do I do this. I am running DOS 6.0 and Win 3.1 Thanks for any input.

Mark, Why bother with the second I/O card? You should be able to run your CD-Rom on the same cable as your hard drive. If you have it set to Slave and your hard drive is set properly as master then everything should work. Save your other I/O card for your next project and keep this one simple. Maybe the system will see your CD-ROM in this setup. Good Luck, Doug

I tried your suggestion but the same message unable to locate cd-rom drive. I plugged the end conector to the HDD and the middle connector to the CD. Set the jumper on the CD to slave and rebooted. I looked in my setup to see if there were setting for slave and master, but, it just has hard disk C and hard disk D. Is it possible that the controller card is to old to support master slave functions? Were do I go next?