rkauer,
Hate to rain on your shoes?
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Source: National Amiga Technical 4/2000
Amiga 2/3/4000's Regarding Their Internal Floppy Drives
For DF0: the device number must be set to DS0 on the drive and this must have the cable with the twist in it.
For DF1: the drive number must be set to DS1 on the drive and this must have the section of cable that is not twisted.
If you have a DF1: in the machine you need to set these jumpers:
* Amiga 2000 J301 must be on.
* Amiga 3000D J351 must be shorted between 1-2.
* Amiga 3000T J351 must be shorted between 1-2.
* Amiga 4000:
DF1: ENABLE (J351) enable 2nd internal floppy (880 KB) as DF1: closed
DF1: ENABLE (J351) no 2nd internal floppy, or 1.76MB floppy as DF1: open
A2000 ---- jumper J301
Motherboard, cable,DF1 drive(set as DS1), cable with twist 4-6,DF0 (set as DS0).
¬¬- - x
- - x DS1 or DF1
- x -
- x - DS0 or DF0
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From:(Dave Haynie)
Newsgroups: comp.sys.amiga
Subject: 2000 Owners Relax
Organization: Commodore Technology, West Chester, PA
(EDIT and additions by Amiga4K)
The floppy cable connects to the motherboard with a KEYED 34 pin ribbon cable connector next to the power supply. Jumper J301 must be changed for a 2nd floppy. J301 is underneath this cable. Remove the floppy cable connection from the motherboard to gain access to J301.
The 34 pin connector looks something like this (side view):
O O O O O O O O O O O O O O O O O
O X O O O O O O O O O O O O O O O
The "X" there is your missing pin. And it's supposed to be missing. And the corresponding pin on the mating connector is supposed to be filled. That's how we prevent people from accidentally plugging in this connector wrong.
The first machines out went out with non-keyed drive connectors. I've got a few early boards without the keying around here. It's a bit more dangerous (at least I though it was!) having the non-keyed connector, but no reason to hold up production. The keyed pin isn't connected to anything, so it doesn't hurt if it's actually connected to the ribbon cable.
If you're having problems with the second floppy drive, chances are probably better than 99.9999% that the darn thing's jumpered wrong. I don't know which vendor's drives they're using this week (could be anyone, they seem to change all the time), but I'll try and post some jumper maps for the more common drives as soon as possible.
> Jon Hill
--
Dave Haynie "The B2000 Guy" Commodore-Amiga "The Crew That Never Rests"
A2K with 2 Floppy Drives
The J301-jumper must be closed for DF1: to be recognized. Other than that, you have not changed locations of the floppys on the cable, I mean: are the floppys connected to the same connector on the cable as they used too? In my A2000 DF0: is connected at the end-connector of the cable(with the cable-twist just before it) and DF1: is connected to the middle-connector.
Both drives are chinon drives - the same model.nr printed on them (FB-354), but they don't look identical. DF0: has 3x2 jumpers while DF1: only has 3x1 jumpers. To make a qualified guess - only the bottom row is important as that is the row that is jumpered on both drives. If you look from the back of the drives - DF0: has the middle and right pins connected jumpered and DF1: has the middle and the left pins jumpered.
