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by Bill Degnan - 04/21/2014 20:33 | |
I got some tips from ChuckG of vintage-computer.com, he said it's not the ready signal it's the Index pulse to watch for.
Just to be thorough I swapped things around in every possible combination (terminators and drive assignments)... So I was thinking...I thought I read someplace that IBM branded QumeTrak 142's were not ideal choices for this kind of work. After not being able to find anything wrong with the Tandon 848-02 (checked P1 Index pulse - seems ok)....If the 8" drive works as intended whenever the 5 1/4 drive is unplugged, maybe I should try another type of 5 1/4" drive. Maybe the 5 1/4" drive is interfering with the index pulse coming from the 8" drive somehow, given their on the same cable. Maybe there is no imagined "terminator conflict" or something having to do with the DBIT adapter and they're just fine. So, going on this hunch I made sure there was a terminator in the 8" drive (B/1) and switched in a Teac YD-580 in place of the QumeTrak 142. It worked. Now for "catweaseling" I have an 8" and a 5 1/4" drive on the same system. The BIOS on my Pentium III does not allow for a 3rd drive (3.5"), at least not in an obvious way. The YD-580 has both HM and DS0 jumpered. I don't have a manual, I guessed that this ok In summary I have the following: Tandon TM 848-02 8" (as 1/B drive with terminator) Teac YD-580 5 1/4" (as 0/A drive) Catweasel MK4PLus My disk imaging station is a no-name (label on board is CS61-EC rev A) P-III running a dual boot DOS 6 and Windows 2000. On the DOS partition I have Dunfield's image disk utilities and on the 2000 partition I have the catweasel utilities. With this set up in theory I can image most any kind of 5 1/4" and 8" DSDD disk, and many SS disks. I have a 96TPI drive I can also add into the mix if need be, but I have not tested it yet. I don't expect to read hard-sectored disks, but I will try that too. Later ChuckG said he has no issues with his catweasel and various drive combinations. I'd get a second opinion before giving up on the Qume 142, I may have to try another one. OR maybe there is something about a QumeTra 142 OEM used by IBM (with IBM label on faceplate). Always more research can be done in the drive world. Not an easy thing to master. Note to self, When I get around to trying a 100tpi drive use DS(Q)D 720K floppy 3.5 see if that works. Reply |