Amiga 4000T Floppy cable PCB?

[moritzmm]

Hi all
I have recently gotten my old 4000T re-caped, and I’m now trying to setup a nice workbench.
For that I have purchased an Gotek drive, but I am a little confused with the floppy cable.
There I an extra little pcb on the end nearest the controller, and the floppy cable doesn’t have any twisted leads.
If I remove it and only have the Gotek drive on the cable I can sort of get it to work. With the pcb in place the drive will not read the disks from the usb, Workbench just shows DF0:?
Anyone having any experience with that .
Regards

[lesta_smsc]

When I used Gotek in A500 I just used existing floppy disk cable. You need one without twist. Ensure pin 1 goes to pin 1 on the Gotek. My one had the cable wrong way round so I'm sure someone was tinkering before I bought the A500.

[moritzmm]

Hi
The 4000T does not have an external connection for disk drives. The 4000T comes with a ribbon cable that allows for two floppy drives.
I think that the Drive in my 4000T might be a PC drive as I think the later 4000T was produced with that.

I read somewhere that some of the lead in the cable was twisted before the last connection. That is what it was like in the old PC’s

Does the pcb do soothing like pin 32 /2 conversion for pc drives or is it doing some sort of master slave connection on the cable.

[nexus]

that adapter is so the A4000T can use HD drives as DD you would need it only on the drive that is HD
since you arent running the gotek in HD mode you wouldnt want that on the gotek but the real HD drive in your A4000T
the REAL drive is usually a Sony HD PC drive

Without the twist, we have to configure the drives and set them to be drive A for one and B for the other, because when the motherboard selects for example drive A, both drives would receive the select signal if they are both configured as a drive A. To avoid this, we should setup them by jumpers or by hard-wiring their role so there would be a drive set to be drive A that would listen to signals on the select A wire, while the other drive would be drive B that would listen to signals in select B.

http://bboah.claunia.com/a4000tatech.html
jumpers at bottom for the module

[moritzmm]

Thanks for the reply.

So the floppy cable with room for two drives that is in my machine is not correct, there is no twist in it.

Perhaps I should go and scavenge the scrap yard for an old PC disk dive cable with A/B twist in it.

Then I need to change gender on that converter to make it fit directly on the PC drive

regards Moritzmm

[nexus]

well that adapter i think does the twist
i havent played with the A4000T i have yet so im not 100% on that but im guessing it would have too
also its easy to make any floppy cable with a twist you just pull the cable off the connector the connector is basically a bunch of mini clips that clip to the wire
so you can take it off and do the twist
but if you are using the real drive and that adapter with gotek then dont use a twisted cable

[moritzmm]

Now I place the PCB directly on the Original Drive. It works
If I have the Gotek on the cable they both read at the same time, so it looks like they have same ID in the change.
Think I need to modify the cable or find another one.

[nexus]

yes that adapter needs to be only on the REAL floppy like i said
but the gotek i think needs to be DF1 in this case so you may need to make sure its in DS1 jumper
http://relay.pp.fi/Amiga/A4000/A4000FloppyCableFix/
JUMPER SETTING FUNCTION
J250 OFF No second internal floppy or second floppy (DF1) is High Density 1.76MB
ON Second internal floppy (DF1) is Double Density (880K)