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-
- December 12, 1993
-
-
- My 1.2M FD that I had used with my 286BB, and now
- my 386BB, decided that it really did not want to work
- anymore, (Actually, it sort of still does, but give me
- a lot of errors/corrupted file messages that aren't
- real, as confirmed by other PC's). I seized upon the
- opportunity to buy a new Teac Dual Drive, one that has
- both a 5.25" and 3.5" in one 1/2 height case.
-
- When I bought the thing, I noticed that there was
- only one (1) connector on back. The cable coming off
- the BB, has two (2) connectors, 1 before the twist, and
- 1 after. Well, I connected the last connector (after
- the twist) to the new drive. No matter what I did in
- BBsetup or PC Prefs, I could only access the 5.25"!
- When I connected the first connector, (before the twist)
- I could only access the 3.5"! In both cases, when the BB
- booted up, it would tell me about a drive failure, as if
- I didn't already know...;-). So now, I could access either
- floppy drive, but only one at a time with a cable change.
- I concluded that the drives were working, but the BB or
- cable did not "speak" correctly. It turned out that it
- was the cable. Talking to Kelly, one of Harv Laser's
- friends, whom I had ordered a couple of external 3.5"
- SCSI cases earlier in the day, found out which pins on
- the BB cable were what.
-
- The twist of the BB cable consists of pins 10-16.
- They are labeled as follows before the twist;
-
- Pin 10 - Drive Select 0 (DS0)
-
- Pin 11 - GND
-
- Pin 12 - DS1
-
- Pin 13 - GND
-
- Pin 14 - DS2
-
- Pin 15 - GND
-
- Pin 16 - Motor On
-
- Kelly concluded that since software drives whether
- accessing drive A or B, that the drive motor was not enabled.
- I jumpered pin 16 and 12, before the twist, and voila, both
- drives work! If you connect the connector on the BB cable
- after the twist, the 5.25" will be drive A and the 3.5" will
- be drive B. I did not like that, so I connected the connector
- before the twist, and now I have the 3.5" as drive A, and the
- 5.25" as drive B. Making the jumper permanent was no problem
- as the drive comes with a 34 pin to edge connecter converter,
- and I just soldered the jumper there. Of course, I have told
- BBsetup which drive is which size. PC Prefs also knows that
- both drives are internal.
-
- I had not seen any information on the nets that addressed
- the "Dual Floppy Drives", both Teac and now I think NEC makes
- them too, so that's the reason I posted these tidbits.
-
-
- Phil datner@brooktree.com
-
-
-
- Since posting this article on UseNet (comp.sys.amiga.emulations)
- several people have e-mailed me, about having no problems with
- their Teac or Cannon dual-drive out-of-the-box with their
- bridgeboard. Maybe I got a lemon..., but the drive has been
- working great for over 2 months.
-
-