Amiga 4000 & 2nd 1.76MB Disk Drive

[jimbo100]

I have got two HD floppy disk drives installed, however DF1: will not read DD or HD Amiga disks.

DF0: is jumpered as DS0 and DF1: is jumpered as DS1. I have the floppy cable with the twist at 4 & 6 and J351 is open as per the A4000 manual. (I have tried it with J351 closed but the result is the same) The floppy cable has DF0: in the middle and DF1: at the end.

Now if I swap jumpers and turn DF0: to DF1: it becomes the dude drive and DF1: to DF0: becomes the 1.76MB drive so I know both work ok. Both drives are Chinon FZ-357A models.  

Anyone got any ideas on how to get DF1: to correctly read Amiga disks. I did this 13 years ago and I don't remember having this kind of problem!

[jimbo100]

DF0: sits in the middle before the twist on an Amiga 4000!

J351 should be open if no DF1: is installed or it's a 1.76MB floppy, so in other words no jumper should be used to short J351.

This is according to the A4000 User Guide which I have in front of me!

The Big Book of Hardware has it the other way round but it's wrong!

http://amiga.serveftp.net/A4000_HardwareGuide/mbjumper.html

[jimbo100]

Not quite right, if 4 & 6 are the only lines twisted you need to change the second drive to DS1.  If 10 & 12 are also twisted then they can both remain DS0.

http://amiga.serveftp.net/A4000_HardwareGuide/flcbprob.html