gopstein@soleil.UUCP (Rich Gopstein) (07/28/88)
I would like to add a 3.5 inch 1.44 MB floppy to my 6300. The machine already has one 5.25 inch 360K floppy on the internal controller, and a 20MB hard disk on an everex controller in one of the slots. A call to the ATT PC Hotline confirmed that the internal floppy controller could handle the 720K 3.5 inch floppies, but not the 1.44MB variety. The person I talked to mumbled something about bending up pin 17 of the floppy controller chip on the motherboard to disable the internal controller so that I could install a floppy controller board in one of the slots. Can anyone confirm that this will work? The person I talked to didn't sound very sure of himself, and I am a little concerned about ripping the machine apart before I have more information. Thanks. -- Rich Gopstein ..!rutgers!soleil!gopstein rbg%smvl.decnet@ge-crd.com
pfales@ttrde.UUCP (Peter Fales) (07/30/88)
In article <346@soleil.UUCP>, gopstein@soleil.UUCP (Rich Gopstein) writes: > > I would like to add a 3.5 inch 1.44 MB floppy to my 6300. The machine > already has one 5.25 inch 360K floppy on the internal controller, and > a 20MB hard disk on an everex controller in one of the slots. > > A call to the ATT PC Hotline confirmed that the internal floppy controller > could handle the 720K 3.5 inch floppies, but not the 1.44MB variety. The > person I talked to mumbled something about bending up pin 17 of the > floppy controller chip on the motherboard to disable the internal controller > so that I could install a floppy controller board in one of the slots. Actually, it is pin 17 of the I/O decoder PAL. This PAL is located next to the two ROM chips, and is in a socket, so lifting the pin is easy to do. I have done this and it works. You are correct that the native disk controller can not handle the 1.44 MB floppies, but it should handle the 720k drives with the appropriate DRIVPARMS in CONFIG.SYS -- Peter Fales UUCP: ...att!ttrde!pfales work: (312) 416-5357 AT&T, Room 2F-217 200 Park Plaza Naperville, IL 60566