Drives confirmed working with KryoFlux

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mr.vince
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Re: Drives confirmed working with KryoFlux

Post by mr.vince » Wed Nov 10, 2010 9:59 am

Ok, I can only assume that this particular drive is dead or damaged. The thing is... if this worked once, then not again, but does with another drive...

Also, I found this while googling. It obviously was written for the Catweasel, but also suggests general problems with these types of drives:
Three drives are known to be incompatible with the Catweasel line of controllers:

Mitsumi D359 series ("Newtronics", bad head alignment on brand new drives, interface flaws)
Teac drives with integrated flashcard reader (also made by Mitsumi)
Citizen floppy drives as used in Compaq computers (interface flaws)
Here's the source; the original does not seem to be available anymore (404).

barkingboy
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Re: Drives confirmed working with KryoFlux

Post by barkingboy » Wed Nov 10, 2010 11:59 am

Hi,

So far only tested with 1 drive (more to follow):

3.5"
Panasonic JU-253-071P - Track 83 (84). I believe that this drive can only read DD disks, but maybe this is a jumper restriction?

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mr.vince
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Re: Drives confirmed working with KryoFlux

Post by mr.vince » Wed Nov 10, 2010 2:27 pm

Nope, DD drives have different heads. Apart from electronics, this won't work...

barkingboy
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Re: Drives confirmed working with KryoFlux

Post by barkingboy » Thu Nov 11, 2010 9:20 pm

5.25" (DD)

Qume Qumetrac 142 (1985) - Track 80 (81)

I have had success with this drive making .D64 images - but had to use the "slow" firmware to get the max track reading.

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mr.vince
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Re: Drives confirmed working with KryoFlux

Post by mr.vince » Thu Nov 11, 2010 10:05 pm

Cool. Seems like it's good for something... :)

barkingboy
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Re: Drives confirmed working with KryoFlux

Post by barkingboy » Fri Nov 12, 2010 9:50 pm

Tested another today.

3.5"
Panasonic - JU-257A606P - Track 83 (84)

Joe Maroni
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Re: Drives confirmed working with KryoFlux

Post by Joe Maroni » Sun Nov 14, 2010 9:32 am

i currently use my external GoldenImage drive...i don´t know what kind of diskdrive was built in the external case...i just know it can read up to track 83

esynthesist
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Re: Drives confirmed working with KryoFlux

Post by esynthesist » Sun Nov 14, 2010 2:08 pm

mr.vince wrote:
esynthesist wrote: That would cost a lot more than the drive is worth :) I got it for free :D
I can survive with the Teac.
Yes, but we're really keen on finding out why my rev. here works, but yours does not...
In the meanwhile I have tried the slow firmware with the Chinon FZ506revA too, and also different jumper settings on the KryoFlux board.
Still no luck...

Would it help to do some measurements on the 34 pin connector with an oscilloscope, in order to find the cause of the problem ?

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mr.vince
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Re: Drives confirmed working with KryoFlux

Post by mr.vince » Sun Nov 14, 2010 2:43 pm

Sure.

Will email you, will be quicker.

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Malvineous
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Re: Drives confirmed working with KryoFlux

Post by Malvineous » Mon Nov 15, 2010 1:36 pm

Just tried it out on two 5.25" drives, neither of which work ;-)

One was an NEC FD1157C (Dec 1987!) which did seek to track 83 but refused to read anything, and unlike a 3.5" drive I tried earlier, behaved the same with and without a disk inserted. Luckily this is already listed on your page of supported drives, so it must be a problem with the drive. I will test it in a PC and see if it behaves any different (only found this drive two days ago in a dumpster so perhaps this is no surprise.) Slow firmware didn't help.

The other drive is a double density unmarked drive. Warranty sticker seems to indicate manufacture date of 1987. PCB has "F561MB-02" on it. Cast iron base has "T P C, Made in Japan" moulded into it. The -c2 command failed on this drive (head loaded then unloaded) but using the slow firmware the head did seek all the way in (then made some clicking noises like it was trying to seek further than the head could physically move) but still returned the usual failure.

EDIT: Just tried a Panasonic 3.5" JU-257-204P and again it did seek to track 83, but I couldn't read anything (this is from the same dumpster as the first 5.25") Will have to do some more investigating when I can dig out an old PC and a known good drive, but unfortunately it's getting late...

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