CHINON FX-354

[grazey]

Hi Guys,

I'm having trouble with an old external floppy.

It's a CHINON FX-354.

By default the drive is set as Drive A: , however I would like it set up at B:

I have searched the web but can not find the correct jumper settings. I have experimented and tried multiple settings but none set it to B:

Any ideas? (I have attached a photo of the current settings)

IMG_4509.JPG (164 KiB) Viewed 313 times

GRZ

[rubber_jonnie]

So first off, what machine are you trying to connect it to? For Atari ST all drives need to be set to DS0 to be seen together.

[grazey]

MegaSTE

[rubber_jonnie]

Then AFAIK you will need to have it set to DS0 and connected to the external floppy port in order for it to run. Does it work as a drive A when set to DS0 and connected to the internal drive connector?

[grazey]

Yes, that's what I've found.

The floppy only works when set to DS0 (like in the photo).

However, this means the internal floppy doesn't work. For example, if I autoboot with a disk in the internal drive and one in the external drive it boots from the external drive.

I can not use the internal and external together.

I'm writing a floppy imager program, I thought my crappy code was at fault, but it seems not

GRZ

[rubber_jonnie]

Ok, unusual.

I'd assume that it would work the same as any ST, whereby you would have both drives set to DS0, and the ST does the deciding of which is A: and Which is B:.

At least that's the way my external drive works on all my STs, though I have to say I've never tried it on my MSTE as I have that network connected with a CosmosEx, so no need for 2 FDDs. Otherwise works fine on my STs, Mega STs and STEs.

I certainly never had any of those try and boot from B: before.

Wonder if the MSTE is different? I don't know enough about it as not had it long.

[grazey]

Ok,

I'll try the drive on my STFM to narrow things down a wee bit.

GRZ

[rubber_jonnie]

Good stuff.

[grazey]

Testing Done

Ok, spooky indeed!

External drive works fine on my 1040 STFM

But not on my Mega STE!

On the Mega it continues to act as Drive A, so I can't use the internal drive.

Grz

[czietz]

In the MegaSTE, check jumpers W401 and W402 for the correct settings:
https://docs.dev-docs.org/htm/search.ph ... +Schematic