Is this suitable for flippy modding ?

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ZrX
Posts: 577
Joined: Tue Dec 06, 2011 9:09 pm

Re: Is this suitable for flippy modding ?

Post by ZrX » Thu Sep 20, 2018 10:21 pm

If you have two drives connected the other drive will ground the track 0 bypass signal preventing it from working unless the line is cut from that drive.

When using commandline there is a switch -d# that selects the drive number. You have to jumper everything correctly tho.

Vipersan
Posts: 67
Joined: Sun Jul 01, 2018 5:40 pm

Re: Is this suitable for flippy modding ?

Post by Vipersan » Thu Sep 20, 2018 11:24 pm

That explains a lot ..
can I just isolate the pin on the 1.44mb floppy,leave it floating and have it still function ?
If not I'll fit an external switch ..
but which pin on the 3.5" floppy ..?
still pin 33 ?
rgds
Last edited by Vipersan on Thu Sep 20, 2018 11:47 pm, edited 1 time in total.

ZrX
Posts: 577
Joined: Tue Dec 06, 2011 9:09 pm

Re: Is this suitable for flippy modding ?

Post by ZrX » Thu Sep 20, 2018 11:46 pm

It should work simply by cutting/removing pin 33 from the 3.5" drive itself so there's no contact with it and the cable.

Vipersan
Posts: 67
Joined: Sun Jul 01, 2018 5:40 pm

Re: Is this suitable for flippy modding ?

Post by Vipersan » Thu Sep 20, 2018 11:48 pm

Thanks buddy..
a job for tomorrow..
;)

Vipersan
Posts: 67
Joined: Sun Jul 01, 2018 5:40 pm

Re: Is this suitable for flippy modding ?

Post by Vipersan » Fri Sep 21, 2018 12:55 pm

Ok ..I isolated pin 33 to the 3.5" floppy by cutting a single wire in the ribbon close to its connector..
Sadly nothing changed ..
I also tried pulling the drive zero connector just in case I'd cut th wrong one.
the GUI behaved just the same ..
reads side A perfectly but not side B of the flippy.
what else can I try ?
perhaps someone could kindly explain ...what _could_ cause this .
?
what would I see if I hadn't removed enough chassis aluminium with the dremel ...
or not made my arc deep enough on the zero track actuator arm ..
or not removed enough plastic sleeve in front of the 'shifted' bushing.
Just how critical are these mods ?
and lastly ...is it possible flippy mode simply isn't functional in dual drive mode.. with the flippy drive as drive (1)
?
Attachments
DSCF0040.JPG
DSCF0038.JPG
DSCF0036.JPG

ZrX
Posts: 577
Joined: Tue Dec 06, 2011 9:09 pm

Re: Is this suitable for flippy modding ?

Post by ZrX » Fri Sep 21, 2018 1:06 pm

Pin 33 is cut from the modded drive so that it's not connected to the other ground pins anymore?

The modded drive is connected to the cable before the cut wire?

And the 3.5" drive is connected to the cable after the cut wire?

Vipersan
Posts: 67
Joined: Sun Jul 01, 2018 5:40 pm

Re: Is this suitable for flippy modding ?

Post by Vipersan » Fri Sep 21, 2018 1:14 pm

Yes to all three ..
Pin 33 (edge connector) of the flippy drive was cut and isolated ..
a wire connected to that isolated pin is connected to the base of the transistor via a 1K resistor.
I cut the ribbon (pin33) to the 3.5 inch drive ..
..but also tried with its IDC connector pulled off ..
same result ??
my transistor is mounted top side of the flippy drive board and can be seen in photo 2 above ...the base wire connecting to the edge connector is visible in the top photo (1)above
and the cut ribbon to to the 3.5 inch floppy ...shown in the bottom photo(3)-above
rgds
Attachments
DSCF0043.JPG
DSCF0042.JPG

Vipersan
Posts: 67
Joined: Sun Jul 01, 2018 5:40 pm

Re: Is this suitable for flippy modding ?

Post by Vipersan » Fri Sep 21, 2018 8:47 pm

In desperation I tried another floppy cable connecting the kryoflux unit directly to the modified flippy..
I moved the jumpers back to single drive only and left the 3.5" drive disconnected ..
I tried the GUI again ..in just about every mode I could think of ..
Side A reports a good scan as does side B of defender of the crown ..if I manually flip it over ..
But sadly I can't scan it with a single pass with the GUI ..
I tried scanning it from a command prompt ...amd although this forced an dual side read ...the B side is reported as unreadable ..bad sectors etc.
Could this be a firmware issue ?
Could it be that I'm running a version of firmware that doesn't support flippy ?
I really am clutching at straws here..but I simply dont understand why side A or B manually flipped reads good..
As does a DOS MFM disk which naturally reads both sides.
I have a feeling I will never get this going ..and dont understand why ..
doh!

ZrX
Posts: 577
Joined: Tue Dec 06, 2011 9:09 pm

Re: Is this suitable for flippy modding ?

Post by ZrX » Fri Sep 21, 2018 10:11 pm

Ok, so what does the output look like if you go via the command line dumping some ordinary C64 floppy:

DTC -b-8 -ftest_ -i -y -g2 -k2 -i6 -l8

Vipersan
Posts: 67
Joined: Sun Jul 01, 2018 5:40 pm

Re: Is this suitable for flippy modding ?

Post by Vipersan » Sat Sep 22, 2018 10:12 am

Thanks ZrX
Tried again ..with just the flippy drive attached to the Kryoflux board ..and single drive mode with the jumpers.
I dumped the Defender disk using the command line you provided ..only replacing 'ftest' with 'fDEFENDER' ..so as to make it easier for me to spot.
attached is a cut n paste screen grab of the DOS process ..
not sure if DTC keeps a log ..so this was easier I guess.
TBH it doesn't look too bad ??

I do remain confused however I cannot get flippy mode to work in GUI.
Attachments
DEFENDER.jpg

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