A2000 - Removing floppy drive

[textory]

hi,

the df0 floppy drive of my A2000 destroys all the disks I put in. I'd like to run the A2000 with two floppy drives, so I'll remove the bad drive and connect an external drive.

Question: Do I have to jumper the remaining df1? Or will the system detect it automatically as the new df0?

Thanks in advance

textory

[Darklight]

I would imagine that you will have to jumper it as DF0:, because otherwise how would the 2000 know which one should be DF0 or not?  :-?
I might be wrong, but I'm pretty certain you do have to jumper it, I know you do with external drives, so it should be the same.

[textory]

df1 has a lot of possible jumper settings... there are 8 pins and 5 jumper on it. Really bad that I got no digicam to post a picture of it.

I'm sure I'll have some funny hours testing each one. I hope someone in the forum has a very good idea.

[adz]

What model drive is it?

[shaf]

If you remove the DF0 Drive, Jumper DF1 to DF0 and change the drive cable.

If I remember correctly there is a twist inb the FDD drive cabe to dirrerentiate between df0 and df1.

Shaf

[melott]

The easiest way is to just pull the bad floppy and
set the jumper on the good floppy the sames as the
bad one.
Also make sure you set the jumper on the MoBO to see
only one floppy else it won't boot.
Jumper 301 on the MoBo, it has 3 pins. Just set it to
pin 1 open and pins 2 & 3 jumpered. That will set the
MoBo to see just 1 drive. The jumper is next to the
floppy drive cable plug on the MoBo.
If you have a jumper or dip switch on the external
drive that will have to be set to df1. Not all external
drives that.

[textory]

Hi,

@adz

sorry that it took some time answering.

The df1 in my A2000 is a Chinon FB 354 Rev. A (the bad one df0 is a Matsushita JU-363-282 (with a Sankyo board) with 12 or 14 Pins and lots of Jumpers... scary!)

It has a Jumper with 3 Pins... (and I guess there are not many choices... ;-)

1 3 5
o o o
---


@shaf

thanks for reminding me on the twisted cable ;-)

@melott

I didn't know that I have to change a jumper setting on the MoBo in addition to change settings on the drive... thanks!

Two different drives... I bet the Chinon is not original, maybe the Matsushita either. Anyone around who knows something which drives were used originally?

[adz]

@textory

Have a look here and  here .

Hope you find that useful :-)

[PaSha]

Two different drives... I bet the Chinon is not original, maybe the Matsushita either. Anyone around who knows something which drives were used originally?

Both of them.

Have a look at http://www.amiga-hardware.com/showhardware.cgi?HARDID=17

J301
This jumper is closed to add a second internal floppy drive, open to leave the second floppy out of the main unit box. The Amiga expects an ID bit stream from each floppy drive; this lets it determine the drive type. External floppies have this ID circuitry on board, but as it's not an industry standard capability, it has to be implemented on the A2000 motherboard to save cost on internal drives. Leaving the jumper open prevents the Amiga from seeing the ID sequence.

Open this jumper, and simply try sticking your Chinon drive on the 'untwisted' floppy connector where the bad df0: used to be and see if it works. If you have two twists in the cable, it will work without changing any jumpers. If you only have one twist, your Chinon is most likely jumpered as DS1 (=DF1:) and will need to be rejumpered as DS0. There should be a 'jumper map' somewhere on the drive, but anyways:

It has a Jumper with 3 Pins... (and I guess there are not many choices...

1 3 5
o o o

Are you sure there are only three pins? and not six (ie three pairs)? The jumper block should short(cover/connect) pins 3&5.

-Paul

[textory]

Hi,

@adz

yes, very useful!

@PaSha

You are right! Of course there are 6 numbers on the back of the board an 6 soldering. Only three pins visible, and 1+3 (or 2+4) are connected.

I'll try all possible settings... let's see what happens.

Thanks
Stefan

[PaSha]

@PaSha

You are right! Of course there are 6 numbers on the back of the board an 6 soldering. Only three pins visible, and 1+3 (or 2+4) are connected.

I'll try all possible settings... let's see what happens.

Probably 1+3 then. Shift it to the other end of the same row, that would be 3+5.

[Amiga4k]

The Chinon drives were the most frequent drives in Amiga's.
Remove the drive, and view with Power block to your right.

34 pin cable header---6 pin jumper block---4 pin power block

Due to formatting problems with this site, refer to the following as reference to the 6 pin jumper block:

                         X X X
                         X X-X    this is DF0

                         X X X
                         X-X X    this is DF1    

Also, DF0 is internal. You would do better to replace the drive. Need help? Let me know, as I have several internal drives for the A2000 available, as well as externals.