Way to force master?
Posted on 2003-11-02
I have a TEAC DV-28E DVD-ROM module that I'm trying to adapt to work with my laptop. The connector matches up perfectly (I swapped out the interface converter card out for one from another TEAC CD drive that has the same internal connector) with the connector in my laptop, and powers-up just fine. I had looked up the specification outlines for both the original TEAC drive I'm replacing, and the current one, and the connectors have the same pin-outs, so it should be compatible. It even FITS in the same space as the original module.
There's just ONE PROBLEM! The drive wants to be a SLAVE when it should be a MASTER. Apparently, the laptops that the drive is manufactured for have both the expansion bay and the hard disk on the same ATAPI/IDE bus. In my case, however, the expansion bay and the internal hard disk are on separate IDE channels. Thus, the BIOS expects the CD-ROM drive or ANY expansion bay module to be device 0, the MASTER. The drive does not have any jumpers to set which it is, the firmware must have it hard coded.
Because the drive is indentified as SLAVE and there is no master to control it, the drive cannot be used at the moment.
Now, I know that the IDE interface has many pins that control communicaton between SLAVE and MASTER and also tell the host which is which, and I was wondering if I might be able to force the drive into being MASTER by simply blocking a signal? Is there a way?
There does not seem to be any firmware update out there for the drive, or else I would try my hand at simply modifying the firmware image, but the only copy of the firmware seems to be on the drive itself (it IS flashable).
Any thoughts on how to for the drive to be MASTER?