foone Profile picture
2 May, 40 tweets, 8 min read
now that's a new error.
This floppy drive "works" as in it seeks and all, but it is sending ZERO SIGNALS BACK. either that or the disk has been mass erased since last week
WARNING: THIS IS NOT A MAGNETIC DISK
IT IS INFACT A PERFECTLY SMOOTH PIECE OF ACRYLIC
I knew it was a mistake to try to read a CD-ROM in a 5.25" floppy drive
I need to label this drive so I can look into its weirdness later. That's Special Fucked.
and the next one... cannot seek. at all.
ok that's definitely broken then, in a much simpler way :)
some days all you can hope for is simple problems
I'd also be suspicious of my floppy drive cable but all these 5.25" drives are broken in different ways
this one can seek, but only to lower tracks.
it can't seek up.
oh hey this one seeks!
yep, imaged without problems.
So this drive works, at least with DD disks. Let's hope either I'm imaging DD disks or it also works with HD disks.
but first, before I go trying to image old disks with it, it's cleanin' time
and it turns out the images I need to archive today ARE DD, and image perfectly!
and disk 3 is showing the "no flux reversal" problem.
the fuck? disks 1 and 2 were fine.
maybe my cable is intermittent and the data pin is going out?
*chants POWER CYCLE like NORMAL VIEW from the mst3k movie*
power cycle didn't help. switching which connector on the cable I was using did.

yeah I think this cable may be damaged.
New cable, newly cleaned. Still getting bad sectors, so I think this disk may just be actually damaged. But let's hope the flux keeps reversing
Here's the one that can only seek up, not down.
Yeah I'm not an expert but I don't think floppy drive stepper motors are supposed to have visible rust
This is a TEAC FD-55GFR. The top of the line for the FD-55 line, apparently.
vogonswiki.com/index.php/Teac…
Mine's got a IR4N10 chip. That's TEAC branded but it's apparently made by Sharp, who did a bunch of these sorts of chips, none of which are documented.
ok I partially disassembled it and I think the stepper motor itself might be fine? because it was very hard to move while assembled, but once I took it apart, it moves fine. I think it's actually these rails, which are definitely gunked up. I'll try cleaning and re-lubing them
The stepper motor has a TEAC sticker on it. Part number 14769070-90, by Shinano Kenshi Co
yeah this motor hasn't had a good time.
the other side looks fine at first glance, though.
with the rest of the motor removed this part should spin smoothly though, and it doesn't. there's a bunch of friction inside that bearing
yeah, no. that can't be good
Those bearings are NMB R-1650HHs
They still make and sell them!
nmbtc.com/parts/r-1650hh/
So, a bunch of cleaning and a bit of relubrication later, let's see if it works now.
CALIBRATE GOOD TIMES COME ON
ok this is weird.
So, capturing a disk doesn't work. Why? because the disk isn't spinning. That's weird, right?
so I look closer and think maybe their an issue with the power supply, and it turns out the power supply fan isn't spinning either.
uh-oh.
and it's now providing, instead of the traditional +5v and 12v...
1.6v and 7.5v!
so, the question now is: did my power supply spontaneously die?
or is this drive so fucked up it killed my power supply?
because I'm still getting those voltages with the drive disconnected!
only one way to find out: potentially kill another power supply!
hang on my multimeter just died
ok I got it working long enough to confirm that PSU has +5v and +12v at reasonable voltages.
We've Got Spin!
and yep. The drive imaged with no problems.
ignoring the fact that it only imaged half the disk, because of a weirdness in how I set up that profile. that's a thinko on my part.
I have located the issue with the multimeter.
Apparently it's very picky about if both batteries are fully installed

• • •

Missing some Tweet in this thread? You can try to force a refresh
 

Keep Current with foone

foone Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @Foone

4 May
look I'm not saying it's Bad Ideas O'Clock but hey you know that period when Intel was making Pentium II/III CPUs that fit into slots? and how there were adapters to let you fit socket 370 chips into them instead?

Sure is a lot of space on that board. Image
what if you didn't put a socket 370 chip on there? you have plenty of room for other chips and any interfacing circuitry you need
I wonder how well you could build a "Slotket adapter" that didn't adapt from a socket 370 pentium to a slot 1 pentium, but instead just had a modern ARM chip or two?
Read 59 tweets
4 May
papers please apparently renders out documents to static images at creation time, which means that no matter how much you hack the text ram, it'll never change.
I got the top citation and then hack the ram to say "Biolated", but only the second citation (gotten later) changed.
it doesn't do that for the Official Bulletin, possibly because it has multiple pages, but unfortunately it turns out it uses a DIFFERENT FONT
Read 5 tweets
3 May
I think this pentium II really wants to be a mac
I have no idea what's going on with the 3.5" floppy drive there. it's like, they had a place for one, but put it in a 3.5"-to-5.25" adapter instead?
the back. It's ATX, and oh god it's one of those bastards that can slide out the motherboard.
Read 7 tweets
3 May
I'm personally offended at d*gec*in going up in price from nothing to barely anything.
And you know why?
Because back in like 2014, someone sent me a pile of them because these silly things were being talked about a bunch and then I didn't care about them at all
and every time someone goes d*gec*in is now at 0.25$ I get closer to having to care AND I DON'T WANT TO
especially because I haven't touched them in literally 7 years.
they're in some backup of a backup of a backup on a hard drive in a box hidden in a storage unit behind a sign labeled "beware of tiger"
Read 9 tweets
3 May
Someone should make an annotated version of Star Wars, where every onscreen character has their name overlaid, and it's clickable so you can go look up their story.
Like, Tenn Graneet is the master chief gunnery officer who was responsible for firing the main laser on the first death star. Image
He had served in the clone wars, and was injured in his right arm, receiving prosthetic implants that made his arm much stronger.
He had fired the death star laser four times before Alderann, first on a rebel Starship and then three more times on the planet Despayre.
Read 19 tweets
3 May
John Romero... Oh no, what happened? Image
JOHN ROMERO'S ABOUT TO GET ARRESTED BY THE OAKLAND POLICE
JOHN ROMERO'S ABOUT TO MAKE YOU HIS ONE PHONE CALL. I HOPE YOU HAVE BAIL MONEY FOR HIM
Read 8 tweets

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Too expensive? Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal Become our Patreon

Thank you for your support!

Follow Us on Twitter!