Evil Computers
T-dåks & his w.p.s. Lyrics

We have lyrics for these tracks by T-dåks & his w.p.s.:

Blood (Don't look now, we're coming) I plug the ladies in Mum …
I Only Live Everybody at the party's so lonely In a room full of…
Intro [Master P] Where is romeo? Where is romeo? [Lil' romeo] …
Rainbows Yo, yo, yo Ridin' on my boat Yo, yo Ugh, Storm is on…

Skulls I move too fast I can't slow down I think too much No…
Yesterday (Hey baby) Yesterday has just departed Yet tomorrow hasn't…

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Most interesting comment from YouTube:

marcan

6y↑7

Ideally the first thing you do on a device like this is take a full backup of the raw flash (which can be tricky depending on exactly what kind of flash it is - eMMC and other high-level interfaces are easy and standard, but NAND flash like in this case is trickier and requires specific tools). However, in lieu of that, there is a universal method of doing proper file-level backups on Linux. This is less ideal for backup/restore purposes, but it's great to get a dump of all the files off the device and into a form you can look into on a PC (and in a pinch it'll still save your ass if you break something, though restoring might be more involved). It has the advantage that it can create mostly-consistent backups while the system is running (individual files that are changing might not perfectly match, but you won't get any wide-spread corruption like if you tried to take a raw disk image of a running system).

What you want to do is make a tar archive of the various filesystems on a device. Doing it directly doesn't work, because various filesystems are mounted on top of each other and pseudo filesystems will ruin your day. The trick is to use bind mounts.

mkdir /mnt/root
mount --bind / /mnt/root
cd /mnt/root
tar cvzpf /mnt/sdcard/root.tar.gz .
cd /
umount /mnt/root

... will make an "alias" of the root filesystem (/) at /mnt/root, but, crucially, without any of the other filesystems that are mounted below it. So you get the root filesystem and only the root filesystem. Then it gets archived into /mnt/sdcard/root.tar.gz, which you can extract on a PC (assuming you mounted the SD card on that directory in advance). The 'p' ensures that filesystem permissions are properly preserved. After you're done, undo the bind mount.

You'll want to repeat this for any other filesystem mounts shown by the 'mount' command, that aren't pseudo filesystems (usually anything that has a "real" device name). /dev may or may not be a temporary filesystem, but it is safe to archive if you want to take a look at the device node tree. /proc and /sys are system information filesystems; always ignore those, as they are not real and will probably result in errors as their contents change all the time and are dynamically constructed. Anything with type "tmpfs" is a ramdisk, but safe to archive if you feel like peeking at whatever files are there.

You can skip the bind mount part if a given filesystem has no other filesystems mounted at subdirectories. This is often the case for most things other than the root filesystem itself.

All comments from YouTube:

Knuckx

6y↑36

Canon DryOS is well known and hacked on by both the Magic Lantern (for EOS) and CHDK (for PowerShot/IXUS) projects, in case you want to try to play with the Canon units software. It's also used in Canon's scanners (CanonScan/LIDE) and video cameras (Legria). It will probably have a development boot mode as well, most Canon DryOS products do.

Andrew Nambudripad

6y↑16

Whoa Mike, 1: depending on the file system, you can probably recover the deleted data (odds are the files' inodes were marked for deletion and wont actually get removed until more content replaces it), 2: that NAND bug seems to be repairable also (if it's just a SMD flash device, you can throw a new unit on, partition it and be right as rain.. didnt seem like those were critical hardware faults, so don't continue using the second unit as a parts salvage...)

donpalmera

Hey Andy boy. If you had looked a little harder instead of trying so hard to get that unfunny reiser joke into a comment finally you would have noticed that almost all the options for ubifs are set at creation and not mount time. ubifs is a lot more complicated than jffs etc. I doubt Mike is going to spend a ton of time working through all the structure etc to find some files off of the NAND.

If it was a secure boot situation there would have been noticeable messages about it from uboot as it would be responsible checking the kernel and initramfs signatures after itself was checked by the boot rom in the chip. Google "uboot FIT" if you want to know more.

Andrew Nambudripad

6y↑2

Fair point there Donny boy. I'm no Reiser (for one, I've yet to murder my wife) but I took a look at the docs on Ubifs and it looks pretty bog standard. It has options for LZO but other than that it's about as complicated as one would expect for a flash FS (i.e. not very) re: recoverability. I'd need to see what mount parameters are there (it's in /etc/fstab) to ensure there wasn't anything crazy wasn't configured in, along with the boot parameters (check initramfs and the bootloader) like encryption it is a medical device after all) out-of-the-box wasn't configured but a byte-for-byte recovery. (Each write file i/o the kernel pushes to flash reduces his chances by uh I'd guess disksize-exp(1/ops) hence why putzing around in a blind attempt to fix it might be bad, unless he's configured to mount in -ro) Assuming he hasn't monkeyed with it since then his chances are very high.

That being said, even if he has mucked it all to hell, he might have some way to salvage it -- this looks promising -- http://midsamsung.com/download/system-software/ has a dl for a set of firmware (in the "Detector firmware.zip" there are 43x43, 35x43 and 30x25 subfolders with two bin's eah so I'm assuming there are revisions for different sizes), but I'm not sure if it matches his model etc.

The third avenue I'd pursue is actually contacting a Samsung medical reselelr and asking for a copy. These are high dollar items so the CSR's are generally pretty helpful if you posture as though you actually legitimately purchased this device (and the aux components) and you've been "really happy with them thus far, and are looking to upgrade our units soon enough, but this is really chaffing me!!!". Dr Mike from Massachusetts General Hospital's Radiology is quite upset

(I was previously watching that on my Nexus w/ a 4" screen & my dog was hogging my bed at the time, but by all means if you've got a spare GSM phone with a larger screen to replace it, I'd readily welcome it it ;))

donpalmera

6y↑4

>depending on the file system, you can probably recover the deleted data

You wrote a lot but didn't spend the 2s to look at the text and see it's ubifs..

Alex Wood

6y↑5

Hi Mike, really interesting stuff!
I reverse engineer embedded systems for a living, got to admit it’s fun to watch someone else wrestle with the same issues I do, day in and day out lol. As for recovering your lost files, I have a couple of suggestions. First off, if you can, use the nand subsystem in uBoot to extract the entire raw contents of the flash memory via the serial port. It’s slow, but reliable and easy to write a script to do it for you, page by page and store the results. Once you have that backup, try and find a firmware update package online and attempt to update the device. If this works, it will replace your missing files. If not, you might be able to extract the update package using a tool called binwalk and find your missing files, put them on an SD card and transfer them back over to the DUT.
If you can’t find an update package, it’s a bit harder! You need to use the nandsim kernel module for Ubuntu to create a simulation of the nand flash device on the DUT in your PCs ram, then copy the raw data from the nand device you extracted into the simulation. You can then mount that simulation on your pc and run a suit of data recovery tools on it to “undelete” the data. I have done this successfully once or twice. There are some really easy to follow online tutorials. Good luck! I look forward to seeing your next video on these.
Alex

Alex Wood

There are probably easier ways of extracting the raw flash given that you have an sd card socket on the DUT. UBoot can mount sd cards and transfer data, but it’s not uncommon for manufacturers to nerf the stock uBoot and remove most of the functionality for “security” reasons. Daft really as the most secure option would be to just remove the uBoot CLI all together. I’m used to systems where the only data extraction option is the serial port, so I like that method even if it takes over night.
Also, if the flash is in a friendly package, you could just desolder it and use a chip programmer to extract its contents (I use this method a lot too).

Moon Moon

6y↑2

DRYOS is a realtime OS used by Canon in mostly their digital cameras, high end webcams, that sort of thing. It replaced VxWorks donkeys years ago, and supposedly has a simulated dev environment for debugging. It has a USB interface and drivers for remote file systems and network services like a video server. There is a small hacking community for some of their digital cameras through a project called Magic Lantern. Unfortunately, my 7D Mk II is not supported and may take a very long time, if it ever is. Something about reversing the architecture of three (yes, three!) seperate CPUs - two DIGIC 6 CPUs that do the heavy lifting, and a either another DIGIC 6 or a DIGIC 5 dedicated to autofocus and exposure. Each of these DIGIC processors contains an ARM Cortex R4 and 3 other smaller ARM variants apparently, but reversing of this chips is only in it's infancy.

Hope this helps clarify one or two things about DRYOS, and what it tends to be used on.

liljasere

6y↑7

Your videos are always great examples of quality over quantity please never change mike

John Wilson

6y↑1

I had always wondered what was behind those strips on the sides of the canon image receptors. I had been told it just had something to do with being able to tell when it had been dropped. Supposedly you could drop one from waist height and it would be ok. I think I remember the cost of a new receptor was around $80,000 usd for the hospital in 2014.

Wimpzilla aka gRave

For electronics plebs like me, you are truly a master, i admire you.
Thanks you again for sharing this awesome kind of stuff, really interesting, instructive, motivating.
You are the best Mike!

DextersTechLab

6y↑2

Excellent video Mike, really looking forward to see future work on these!

Liam

6y↑2

In theory you might be able to boot the good one from the SD (standardish boot image for Sitara) then image the NAND and then re-flash the image on the broken one.

DUIofPhysics

6y↑25

"Some of the may have been dropped." Ouch... I can't imagine having to tell your boss that you dropped a £30k piece of equipment and they now need to buy a new one...

Jasper Janssen

6y↑3

That’s what happens when you have people operating millions of dollars worth of equipment on a daily basis. Normal office workers are most likely to damage a disposable plastic coffee cup or if they’re very unlucky an entire laptop. But when you’re operating an MRI scanner which costs high single digit millions to low double, or even the much simpler flat x ray things, well...

Gillian Seed

they can afford it

xrtnn

6y↑2

insurance will cover

Ellen Madden

6y↑4

I think the answer is you don't tell anyone and pray to several deities that nobody finds out what actually happened.

mikeselectricstuff

6y↑20

Could have been after they were scrapped of course

1 More Replies...

tuopeek

6y↑8

always wanted a look in one of these, thanks.Even better if you get one working.

Yannique1

Thank you Mike, I can't wait to see this thing putting out images!

Adrian Tripp

haha I heard it too!

Saeedeh Ghaffari

Hey Mike, thanks for the great video.. Can you tell me some tips to follow to make it hard for anyone to do a reverse engineering on a detector? For instance, is it safe to have JTAG pins on the FPGA board?

Vidicon

very cool device. would love to play around with them. Can you post the data/serial dumps?

douro20

6y↑1

DRYOS is used in Canon digital cameras as well. It's fully POSIX compliant.

iwtommo

6y↑4

I havent watched it yet but REVERSE ENGINEERING THANK YOU MIKE

DoitalJosh

6y↑5

The Samsung one has the same processor found in the beaglebone black single board computer. Totally hackable.

Keenan Tims

6y↑2

Almost everything in the medical imaging world speaks DICOM, which a pretty ponderous suite of protocols and formats covering medical image exchange and storage. A decade ago I worked on the software side of this industry, so I don't know much about how they're used clinically, but based on what I can find, it looks like the Canon product does have a workstation component (it doesn't communicate directly with the PACS using DICOM). But my assumption would be that it still does generate DICOM internally, and might even speak to the workstation using it. If you can figure out how to get the thing to register an acquisition, maybe that's helpful information, hopefully all the stuff between the cassette and the workstation isn't all proprietary BS...

For fiddling with DICOM, I like dcmtk, which includes a lot of single-purpose tools to modify/convert DICOM image files, as well as a simple server (storescp) that can receive images over DICOM from a modality like this. You're also going to want a decent viewer that allows easy manipulation of dynamic range level (gain)/window, since these typically take 10-14b images. Mango is a pretty nice Java thing for this.

John Wilson

The image generated should be a jpeg at some point along the way. I don't know if the image receptor does that or if the windows machine running the canon software does. I don't think it gets a dicom wrapper until it is told to export it that way.

Jackson Cupp

They don't generation dicom internally, the acquisition software generates dicom files for transport only. They are held in a raw state before transmission. This way they can fiddle with the image, masking it or processing it in some way, before it's sent to the PACS.

Spirit

6y↑2

See if you can read the flash from the dead unit, maybe it still has the files you deleted on the freshly dead unit.
It says it's corrupted, but it prompts you to stop the autoboot and could kick you out into a similar prompt.

Jackson Cupp

6y↑1

80C can't do auto sense acquisition but the 701c can. Totally correct that the 701C is the newer generation. The IR is used to pair the panel with the acquisition software. The scintillator is cesium that is grown on the glass.

RD Banks

6y↑1

I’ve been waiting to see that break-out flex after you posted on Twitter! Pretty good resolution from the laser printer!

T Komoski

Cool bit of kit Mike and how you come up with this med stuff is cool. Solder on Mike

Sigmatechnica

6y↑13

The Cesium iodide might not be that toxic but the Thallium it's likley doped with is very much so.

goamarty

@ Peter Stalin: So the CsI alone is only 8 times more toxic than table salt and in the range of vitamine A. Of course Thallium is really bad stuff, AFAIK a very nasty death.

Peter Stalin

6y↑1

You are right, bro. The lethal dosage of caesium iodide is relatively high 1500mg/kg against 0.1 to 9.4mg/kg for Thallium according to the data of cdc.

michael bishop

6y↑5

for the units ive worked with, the charge/comms cable is used to set the WPA name/key, and then all comms happen over wifi, and the docking station only provides power

the ones ive used lack IR ports, and the dock cable is only used for pairing, and not normal charging

michael bishop

dont know the exact software used, but it had to download the image after every shot, the detector has only 1 frame worth of storage

rkan2

Do you know which software they connect to or do the devices themselves have a web server one pulls the images from?

Anton Babiy

Many laptops also use coax for their lvds lcd cable but the outside shielding layer is thick foil

YouDoNotKnowMyName

Well I am not that surprised that there is no "ADC chip".
You can use an FPGA, some OpAmps and some passive components to make a delta sigma ADC.

Chuck Norris

Nice to see some actual repairwork instead of destructive teardown.
But I would wear some gloves for that, you never know what nasty fluids were spilled on there.

iamdarkyoshi

6y↑1

Can't wait until the next video.

You're going to create your own image capture board aren't you :P

Jack Zimmermann

6y↑16

Next time, use the "dd" command to copy the entire partition into an image on the SD-card...

rkan2

Yes... Always in these cases.. Just make a goddamn backup with something (usually dd if available..)

rocketman221projects

6y↑13

Just be sure to triple check that you have the input and output the right way around.

K Hikaru

Soo, did you scrap the firmware yet? It was unbelievably easy I was shocked it just mounted some vfat just like that. But what happened there, I've expected it to run as overlay or squashfs or something, yet you think you've managed to write into the flash like that? usually doesn't happen afaik

Khron's Cave

7:50 That TDK part there looks strikingly similar to an Ethernet isolation transformer. Two little caps on the output side and two differential pairs look like a 100Mbps connection, part of that multi-way i/o thing.

Khron's Cave

13:20 Confirmed :P

douro20

6y↑1

If these were GE panels they would had spared no expense optimising them, sometimes to the point where end up having issues in the field they will spend millions trying to fix...

tachyonic

Healthy mix of hardware and software hacking. In uBoot you can copy one partition over the other, I assume one of them is factory default, one of them is recovery and one of them is the main (upgraded). You could potentially copy the factory over the main one. You could also potentially boot factory firmware by holding a pin grounded.
For getting into uBoot, you can try various key sequences at startup (ESC, space, etc) or check to see if a pin needs to be grounded.
Search for "Linux Core U-Boot User's Guide Texas Instruments".

tachyonic

Had a look through the boot screen, it looks like you need to press any key to break into uBoot env. It also boots into mode C1 (normal), I suspect you can force it into factory reset mode, you have to read the datasheet of the chip. There has to be a way to recover from bad upgrades, but it might be possible that some critical parameters will be lost (unlikely).
uBoot seems to be booting from 0xb8000 which you can see at timestamp 1.268s is RAMDISK.This is the kernel, it has a backup. It then mounts mtd14 ("app filesystem", offset 0x5d4000) which doesn't seem to have a backup. I think you might have deleted files from this one, as you can't delete files from "kernel".
If you get lucky, you can perhaps image the file system partition from the bad unit onto the hacked unit using the mtd* utilities in uBoot.

Either way, doing dumps of the systems with uBoot will let others help with the experiment.

BFX

I have some Varian and Trixell detectors at work :) Those Trixells are pretty good because they are realy quick and connected thru the optic fiber. Varian is similar wireless like you have on the bench. I'm also surprised that there is no password to linux. All our detectors is protected by admin account.

Sixta16

6y↑1

Heleho, BFX se taky kouká! Zdarec chlape a všecko nej do 2018!

rkan2

Passwords are useless if you have access to serial ports (and the device itself)

donpalmera

The root console is a standard feature of busybox configured by copy and pasting some examples. It shouldn't really matter unless the serial port is accessible outside the unit.

Proluxelectronics

6y↑1

It would be nice if the GUI's are basically Cannon/Samsung WIFI printer/scanner software bundles...

Paddy Robinson-Griffin

6y↑1

Have to wonder what the three downvoters expected when you delivered exactly what you claimed. Really fascinating to not just see, but to also see someone with enough ability to really press into something I'd have to give up at a much higher level. Thank you

Yumi Watanabe

6y↑6

just few comments on "linux" side of things:
1) you will probably mess things up if you just try to copy everything to that SD card for few reasons - first is "symlinks" thise are havely used in non-windoze world and not supportead by FAT/FAT32 filesystems
2)entryes in /dev /proc /sys and other pseudofiles - when you try to copy it nonsense will happen for example you would just fill entire flashcard with endless content of /dev/zero
soooo... more practical way is to copy entire fs as an image and then boot PC into any linux and just mount that image
from what i see here you need to copy content of ubi0:app ubi1:secure_data and /dev/root those ubi0 and ubi1 are probably in /dev/... somewhere
feel free to PM me if you need more details

RWBHere

At time stamp 7.489715, did you change the country ID to CA, or was that the existing code? As for the CRC errors, can you run fsck to try to fix things? Thanks Mike.

RWBHere

It could also be advantageous to format that SD card with a linux partition, because the MS-DOS one will discard all file permissions, since it still cannot recognise them. The backup would be useless without the permissions, etc.

jekader

Didn't even know these sensors existed. Fun to see though that a 20k$ device is powered by linux shell scripts. Too bad it mounts filesystems in R/W mode so it can be FUBAR'ed easily. Well, I hope we're still going to see this work.

John Wilson

The ge xray systems I've used ran on Linux. I'm sure they cost several hundred thousand dollars each.

polprog

6y↑1

43:25 i hope that eth0 mac is not hardcoded the same on every unit... that would cause some ARP mayhem! hehe

Dr Tune

Hey mike, the flat flex board you whipped up; how did you drill all those holes; you have a CNC pcb drill?

mikeselectricstuff

6y↑1

No holes. header is surface soldered.

Shlanta Of The Mike ็

6y↑24

It looked like that first one had a web server running on port 80

GiddeonFox

Telnet was open and the boot sequence printed something about telnet starting, oh boy

JJayzX

Nick Stallman I saw telnet also.

Nick Stallman

6y↑7

It also had port 21 FTP I think I saw and 23 Telnet

FlatFrog69 RR

6y↑1

Hi Mike
Maybe the Xraytony channel might know more about this ?
Thanks

Casey Muni

Did you have any luck getting an image acquisition software?

̷ ̴ ̸ɢ̸ʟ̶ɪ̸ᴛ̶ᴄ̶ʜ̷ ̶ ̶

Please please try everything to get one working! What kind of x-ray source do you have?
oh, and what microscope do you use?

Kieran Simkin

6y↑7

And the first one had port 80 open on the netstat, didn't you open a browser?!?

imeaktsu7

34:33 those same coax cables are used in NEC's supercomputers

imeaktsu7

6y↑1

33:09 that FPGA looks pretty modern... is it from 2013 or 2016?

rkan2

He said the newer Samsung was from 2014.

marcan

6y↑7

John

6y↑3

was worth the watch for the "aaaah!" once you mounted the SD card :)

Christian Ivarsson

Never underestimate the power of Chili con carne, Mike ;)

John Carr

Lovely teardown especially if you've ever had to lie on top of one for an x-ray :)

eekpie

6y↑1

take a peek at the UBOOT stuff you can usual dump or flash from TFTP via ethernet before boot. Maybe able to ignore the 'bad blocks' and whiff the data back

donpalmera

6y↑2

If you can get into uboot you should be able to mount the SD card and take and image of the nand and then run the ubifs recovery commands on it to get some stuff back.
Alternatively it's possible only the part with the kernel/ramdisk are busted and you'll be able to pull the root filesystem from it and combine it with the working kernel etc you have from the other unit.

mikeselectricstuff

Yes but no good if you don't have the code to TFTP into it. There are commands set up to set up the unit from scratch but they need to pull files from a server

eekpie

couldn't spot a prompt but smashing keys when uboot is loading usually drops you into it

Dusty Circuit

6y↑1

The OP-amp's are probably part of the reference circuitry for the ADC's on the FF-cable. Needs to be super quiet.. Schhhh

Jakub Blažej

6y↑1

It doesn't seem to me to be intended for medical use. I'd expect more sealing and no grooves from the front.

John Wilson

The receptor sizes are 14 x 17, which is the most common size used in medical imaging. I routinely used a disposable cassette cover (giant sandwich bag) and grid to help protect any image receptor I was using. The canon receptors are sealed up pretty well from my experience. That groove along the front edge was tight enough to keep the blood, sweat, and tears from getting inside, at least from what I could tell. Some of the older film and cr cassettes that had to come apart to get to the film or image plate weren't water tight, and had plenty of nooks and crannies you could get body fluids into.

Short Circuit

6y↑2

Just back from the pub, but porn has to wait... :) Also quite relieved so see someone else having a 'jay' for something as trivial as mounting a drive on linux ;)

Simon Tay

A jay?

Mohammed Algailani

6y↑2

41:10
Is davinci-mdio in the boot sequence has something to do with the Da Vinci surgical robot system?

mikeselectricstuff

No it's a TI thing - graphics processing I think

donpalmera

6y↑1

No. TI has a series of SoCs with some video processing IP or something in them that are called davinci. Someone wrote a driver of the MDIO controller (used to talk to ethernet phys) on them and that driver works for the same controller used in later products.

Sixta16

Mikeselectricstuff, that is some AwesomeStuff.

phillrullzXBL

Its painful seeing so many different color Solder masks...

Alexander K

крутая вещь

Sam Gallagher

33:06 That's some length matching on the diff pairs I figure?

bahstrike

the IR is used for sharing panels across rooms- the clinical use scenario is to be able to grab any panel and IR flash it to sync it to that room. the cable connector may serve the same purpose (if present in a charging station) or even to be used permanently if mounted within an enclosure. most panels of this design do support a "non-integrated" or "passive" triggering mode which means it will detect presence of xray to halt the clearing process and subsequently readout an image (every manufacturer seems to implement this differently). "integrated" whereby a synchronization cable from some piece of the system runs to the xray generator is used for inducing a delay upon exposure request so the panel can clear, then when finished, release the exposure. occasionally an additional signal from the generator is used to signal the exposure has completed so the panel may begin readout immediately, but often it is just a preset time delay from trigger to readout. note that "passive" tends to always have some limitation over "integrated" regardless of manufacturer- usually in the form of nonconfigurable exposure window or, even worse, by false-triggering due to mechanical shock or non-triggering due to insufficient dose registration. all the above is specific to static, eg. single, imaging. dynamic/fluoro imaging is not supported in every static imaging device, and i'd be surprised if any of these devices would support a dynamic mode without being integrated to generator.

John Wilson

Long exposures are better for tubes that either can't get enough electricity at one time to power the tube, or tubes that can't handle the heat generated by a big exposure. I remember maxing out a portable machine one time on a 500 lb patient. I ended up having to make two exposures on the same cr imaging plate to get a decent image.

Long exposures can work against you if you are looking at the intestines as you can't really keep them from moving around. However, they can be helpful while a patient is breathing as it can help to blur some things out. If you want to see a lateral thoracic spine, transthoracic humerus, or a pa sternum well, you want the patient to breathe normally so the ribs and the lungs move around and get blurred out into an even density while the spine/sternum/humerus stays still and gets better detail.

bahstrike

if u got an image without any exposure hitting the plate then it's definitely integrated. 5sec (breathing?) is a long time, did you still get a decent shot?

John Wilson

On the wireless canon systems I've used, an image would be generated whether any xrays hit the detector or not. So, I would assume that the control panel would tell the detector when to start making the image and when to stop. There was always a consistent delay of a couple of seconds after the exposure had ended before an image would appear on the screen, whether the exposure was half a second long or 5 seconds long.

Thiago Coura

Now i know from where Microsoft got the idea to Surface

Nuo X

just got an older generation samsung one, booting up with no error, however did not send ethernet pulses, tried a new PHY chip, both ethernet LED wont lit up, computer cant reginize the ethernet....

Jason

6y↑6

It's dhcp'd an IP address and it's running a webserver! Connect to it!

Vaes Joren

1997 datecodes (at around 27:40). I can't imagine these units are 20 years old?

Jasper Janssen

To me the pitch of some of the SMD chips does scream late 90s, early 2000s. It may be an evolution of a design that started around the turn of the century. But I do see a lot of 2011-12 datecodes on actual chips.

rkan2

It is just system date, and without battery is what it defaults to.. Mainly just says it is not running Linux, since then it would be in the 70s..

mikeselectricstuff

6y↑12

There is no RTC backup battery, so dates are meaningless

Simon Østergaard

6y↑1

Ahh, that info heavy fast talking. Love it!

Wolfie M

6y↑73

14:19

That's uh, a squeaky chair you've got there, mate.

Halojen

I don't think it was the chair. It sounded more like a truck engine braking, to me.

RD Banks

6y↑2

design of modern life - I was thinking perhaps a sticky blow off valve?

// probably shouldn’t have posted ‘sticky’ - doesn’t sound too good in that context...

design of modern life

6y↑2

very strange indeed, but rather deceiving, you see, i dont think its a chair issue related noise, appears to be some sort of vent or maybe some uncalibrated pressure valve

RD Banks

6y↑1

I’m so glad someone else noticed that! Haha

TheSkytherMod

You sir, are my hero.

2 More Replies...

DAVID GREGORY KERR

Might be bluetooth on the cannon ones.

John Wilson

I think I remember a sales rep saying they had, or they were going to try to get, images to cast onto a slave monitor with bluetooth 4 or 5 years ago.

Animesh Ghosh

Happy New Year Mike

Peter Perkon

that last linux looks very much like openwrt.

Peter Perkon

Have you noticed the gpio vfs layout? The network name? ubifs?

You may be right that every gnu linux may look the same to you.

rkan2

Every linux looks like Linux.. Openwrt is just a minimized version, as is this, but probably not as much.

Gavin Groce

whats with the db9?

Willy Nebula

Those micro coax would the core conductor be platinum looked very shiny

Aurelius R

no, just tinned copper, maybe silver but I doubt it. cost would be way too high and the signals aren't high speed enough to need it.

Mark Rowland

6y↑5

Mike, the CsI is encapsulated and protected from: visible light (the dark absorbent non reflecting material and the aluminum to stop light entry), and shock ( dropping the panel will crack the CsI that will show up as the equivalent of bone fractures). CsI is non-hygroscopic so it is fairly inert against moisture infiltration and thermally stable against cracks forming from rapid temp changes. As for operational flow, xray machines are either pulsed or steady state, but result in so few photons/pixel that the LCD needs to integrate the CsI light. the comms really do not effect the image, just whatever locally works for data extraction is what the technicians use. there will possibly be some triggering for when to erase and read since there will be a dark image. saturation is not usually an issue because relative to emulsion film, these panels have much larger dynamic range. the minimal function is on the order of clear and read, with calibration mostly to do with weak pixels or maybe dead ones. If you want to play more, let me know.

Mark Rowland

@Luis Villarreal When "dark" (meaning no xrays impinging, except background) the panel will still make counts, somewhat randomly across pixels in the image plane. There is a "gain" setting that may be in the form of the bias on the pixels or panel, or maybe amplifier gain on the ccd, or maybe a threshold setting. The point is to adjust the gain or threshold so the count rate across the panel is much lower than the count rate from using the panel. There also will be some assymetry check across the pixels to make sure there is not a high count region which could obscure image features. I am sure there will be other health checks.

Luis Villarreal

Do you know what do these panels checks in a dark calibration ? Mine was working but since this test doesn't pass I can't use it anymore.

Aurelius R

5y↑2

Those DC-DC modules at 7:20 cost about $25 each in single quantity. That drops to $15 in 100 quantity... jeez no wonder these things cost 10-20k.

mr. necercis

6y↑1

PSHSHSH. Yep.

Jackson Cupp

6y↑1

Yay I work with these every day.

TechNotarius

I write backend and integrate solution for integrate Rayance TFT in medical software.

mikeselectricstuff

6y↑4

Can you get hold of the PC software (assuming it runs on a PC)?

frtard

6y↑10

14:20 ( ͡ಠ ʖ̯ ͡ಠ)

Dr Tune

34:30 holy fuck 0.4mm pitch micro coax connector. Faaaaancy!

TechNotarius

Rayance TFT has more trivial protocol and some useful bugfeatures for grab FW from TFT.
And Rayance has bugged API for Windows.
If you have experience for this vendor like this comment.

Stilbene Net

6y↑2

Linux shell can complete unambiguous names. Works with commands and filenames. Try it out by pressing <TAB>.

Vadzim Dambrouski

Good to know, thanks

donpalmera

Vadzim Dambrouski sure, the renesas rz1 system I have on my desk that runs completely from embedded SRAM.

Stilbene Net

Yeah, maybe there are some ancient systems without. Anyways typing whole paths is such tedious thing, it's always worthy checking out if it's enabled.

Vadzim Dambrouski

Can you actually name some devices that have busybox, but no tab completion? As far as I can remember, every system I've seen just runs default ash with completion enabled.

donpalmera

>Linux shell can

A number of shells run on linux. Quite often the shell compiled into busybox that runs systems like that will have tab completion disabled.

Bill Todd

6y↑1

mike, please use a tripod ! the wobbly camera and movement of the objects ruin an otherwise interesting video

Blowitup1991

but i think he is. or maybe he is levitationg the camera ;)

Kieran Simkin

6y↑1

You didn't do `ps aux`!

clive ramsbotty

yeah i pissed shit and vomited that one panel into liquid damage oblivion sorry mike

ReactsIII

4y↑2

Wow that was fantastically stupid to just pick at the scintillator. CsI is definitely not great to inhale and the film is doped with thallium(very small concentration). Please do more research in the future before diving in headfirst, your video was great.