Questions tagged [hardware]

Any physical device analyzed for reverse engineering purpose. This tag is used to denote that the question is about hardware reverse engineering and not (only) about software reverse engineering.

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90 views

Advice on how to attack my first reverse engineering project?

Suppose you've never done reverse engineering before (apart from taking apart already-broken tape recorders). Also suppose you had a machine as pictured below, with a serial-looking and another multi-...
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1answer
102 views

Is it possible to sniff an ATA Drive password?

Context: I have a proprietary Tandberg Data RDX QuickStor Internal USB3 drive bay for PC (item number 8666-RDX) and some storage cartridges for it. Esentially, these are just regular TOSHIBA MK3276GSX ...
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1answer
32 views

How devices such as smart Wi-Fi power plugs and Wi-Fi ip cameras connect to a private Wi-Fi network?

How devices such as smart Wi-Fi power plugs and Wi-Fi ip cameras connect to a private Wi-Fi network ? The usual steps are the following : You buy the device You install the maker application on ...
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54 views

Chip Identification in Push Button Toy

I have a toy that simply consists of a button which plays a variety of phrases when activated. My intention is to replace the sounds with my own. However, I have been unable to identify the chip and ...
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1answer
56 views

Recover data from old HDD (word files mostly)

I am trying to help my mother recover some of her work from an old HDD, but I am facing multiple problems. Firstly, I do not know the best way I could interface the old HDD with my laptop (or a newer ...
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36 views

XAP2 processor firmware reverse engeneering

I'm looking for way to load to Ghidra,radare or IDA firmware of DFU firmware identified by binwalk as: 0x0 CSR (XAP2) DFU Firmware update header 0x4c8 CSR Bluecore firmware segment I've already ...
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65 views

Extracting a firmware image via U-Boot and mounting/expanding it

I'm attempting to extract the file system from an embedded Hi3518 SoC that runs Linux (Busybox) but has a U-Boot boot loader. There is no console once the device is fully booted, so it seems that the ...
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106 views

Binwalk on flash dump yielding useless files and empty file systems

I have been investigating some routers by desoldering their nand flash and dumping them using a flash programmer. However when I use binwalk on these dumps I end up with fragments of files mixed in ...
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1answer
107 views

Reverse UART communication protocol

I'm objective is to build a custom wifi module to be used on a Samsung AC AR24HSFSAWKN. I have such an official module SWL-B70F for which I'm trying to reverse engineer the communication with the main ...
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33 views

infrared remote codes yamaha RXV-596 / RAV211

My remote (one of ...) is not working anymore. I've search in differents databases, but the model is too old and I've not success to get the IR codes. If someone has this old Yamaha receiver*, with a ...
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78 views

Reverse Engineering a CPU

So, I got inspired through a friend, how single-handedly reverse engineered a little cpu(nvidia falcon) and I was wondering if there any other cpu's like this one, because I want to do this myself but ...
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Trying to edit the source code of AOC monitor

So long story short the AOC monitor comes with a G-Menu gui that lets you customize different monitor features. One specific one I am interested in is the "Dial Point" setting. Where it ...
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76 views

What are these pads called, what can I solder to them and could I do any damage?

I am wondering what this is called (those are 1 and 2 cm marks, divided into 1 mm segments): I'm fairly certain it's not JST. I think the two larger pads are used to hold whatever connector is ...
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22 views

Looking at a PCB is it possible to ascertain the number of layers it has?

Is there a way to ascertain - without special equipment (other than what a "layman electronics enthusiast" may have around) - how many layers a PCB has? Is there some sort of marking or a ...
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36 views

Data XREF in IDAPro (C166/167 Arch)

try to reverse some algo in c167 arch. in a part of the file i saw a variable that located in XRAM mov to accumulator registers and finally xor with other registers. as below: mov r1, word_E1C4 ...
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1answer
86 views

crc - reverse engineering GAL16V8 checksum method

While working with the GAL16V8 (an old programmable logic device), I found out that the Programmers Electronic Signature (PES) of each GAL has a checksum byte I've read the PES of some GALs but was ...
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1answer
63 views

I have a two pin debug interface, confused on how to use it

I'm very much on the software side of things so I'm super inexperienced with debugging hardware. A custom processor I'm working with gives 2 debug pins, and given that it's an ARM system I suspect it ...
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1answer
34 views

Wrong keyboard strokes sent to serial in putty

I am attempting to communicate to a device i have via the onboard rx/tx solder points i found on the board. I am doing this via an arduino uno. The problem i am having is that when i connect to it ...
3
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1answer
112 views

Construct a number from 0-999.9 using 5 data bytes of a MIDI SysEx message

I'm sending MIDI messages to a proprietary turntable that has an LCD screen on it. The normal software sends out updates via MIDI SysEx to display the current tempo on the LCD. The MIDI is being ...
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1answer
61 views

Can a UART port change baud rate at runtime?

I've been probing this CCTV DVR board trying to find a serial port to see if I can get console access to it. I found a set of 4 through holes with no headers that looked like a good candidate. I ...
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1answer
55 views

Interact with a network-less Chinese MP3 player running a modified version of Linux

My friend gave me this cheap little chinese MP3 player. I'm curious about exploring it learning more about the hardware, and potentially seeing if I could expand it's functionality in some way or run ...
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107 views

How does this levitating clock work?

I came across the Flyte STORY clock recently (link) and I’m stumped as to how it works. Does anyone know how it holds the ball against gravity when it’s vertically upright? I asked Physics but they ...
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1answer
71 views

Misterious USB dongle

I have this USB stick that seems to have a slot for a SIM and for a SD card. I don't know nothing else about this module. Searching the codes on internet I didn't find anything. How could I find ...
2
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1answer
211 views

Can a secondary UART be used to access the MCU?

I have a gamepad with a Chinese ShanWan BM-729 SWQP179 22 MCU which is most likely a clone but i didn't manage to find any info on it. The board is also lacking information like serial pins and the ...
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1answer
74 views

Is it possible to read a device's firmware or internal programming in computer's RAM?

Let us say I want to reverse engineer a PCIe-based FPGA device. Can I read or extract the IP core or any firmware in the computer's RAM or by trying to communicate with the device in some way?
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306 views

Samsung A520F usb type-c uart debug mode

I'm trying to create UART cable for A520F phone with USB type-c. Seems, there is no UART debug modes S8+ either. On Samsung phones with micro USB one may access UART JIG mode with 619K resistor, ...
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1answer
68 views

Manufacturer interface on OCZ Agility 4 SSD

Inside the housing of an OCZ Agility 4 SSD I found several additional connectors on the opposite site of the SATA connectors. What are they good for and how to connect them properly? Zoomed:
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1answer
101 views

If flashrom tool don't have support for rom chip what are the ways you can extract data without it?

I am currently working on a Netgear router having MX25L1606E rom chip, my goal is to extract firmware for reverse engineering but flashrom don't have support for it. So question is how someone can ...
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0answers
64 views

Voltage Glitching to Read Internal EEPROM

I am trying to read the cryptographic key from my car key fob for exploration, basically seeing if I can clone it. I popped open the case and I see it's using a Microchip HCS361. The HCS361 stores it'...
3
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1answer
403 views

Analysis of BusyBox Shell router U-Boot firmware

I am trying to get access to the BusyBox Shell and if possible to get a firmware dump. The "U-Boot" has limited possibilities but what is good is "sf - SPI flash sub-system". Can anyone help me get ...
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0answers
2k views

Hacking old gym equipment

Anyone reversed ifit? I just picked up a discounted NordicTrack Elite 11.0 Elliptical on Ebay, I want to hack it. I would like to extract performance data and it would be great if I could control ...
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222 views

Trying to identify Renesas custom SoC through CPU die inspection

Was wondering if someone could help me identify which series a Renesas Custom SoC belongs to within the super-H family by looking at optical images of the die circuitry layout of the device, and by ...
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311 views

Dumping firmware from Winbond W25Q64JVSSIQ using BusPirate

I have a Winbond W25Q64JVSSIQ flash chip that supports SPI. I've connected BusPirate through a SOP8 cable to the memory chip. PWR and VREG LEDs are on, so they're connected. BusPirate is connected to ...
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0answers
48 views

Is there a way to identify a specific microprocessor model?

I'm working on reversing a USB flash drive controller chip. I know there's a microprocessor that runs some 8051 variant, and I have the ability to run arbitrary code on it. There's lots of different ...
2
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2answers
352 views

Reverse engineering a checksum algorithm

I am attempting to implement an editor for a discontinued hardware drum synthesizer which uses undocumented system exclusive MIDI messages for communication. I've figured out the patch format, but I ...
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1answer
34 views

id the HW port and protocol

i have a vtech baby monitor and since i want to be aware of it while i'm playing in VR (PC, HTC vaive/Valve index) i still want to see if the baby starts crying. on this monitor there is external ...
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116 views

Export logic analyzer data to protocol analyzer

Probably I'm little ot but I'm unsure where to ask this. Is there any easy (already working) way to export my logic analyzer data (vcd format) to a protocol analyzer like Wireshark? I'm analyzing an ...
4
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1answer
136 views

What, tools do I need to break down the N64 console for private study? [closed]

Alright, I need to know this ASAP, I'm breaking down my own n64 console for private study on the n64 firmware and how it does what it does best. So, what tools would I need To break down this console?...
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0answers
159 views

Reversing a firmware update for an LG HTS

I'm trying to reverse a firmware update for an LG Home Theater BH7220, and I've hit a brick wall. This HTS has a main chip from LG referred to as "BH7000:1165" in the schematics. The chip has the ...
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1answer
296 views

Reversing a key-gen firmware for RISC-V

I would like to study this firmware for Sipeed MAix, a RISC-V development board. You can download it here: key_gen_v1.2.zip. As the name suggests, its purpose is to calculate and print a "machine key"...
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1answer
93 views

Need to identify a diode

I need help as i'm new to reverse engineering. I need to identify a diode in a PCB that i'm currently working on. Do you guys have any idea or advise on how to identify the diode. The diode which I ...
2
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1answer
663 views

Dumping a NAND Flash

I am currently trying to dump the content of a NAND Flash that is part of an embedded system. The chip is a QCA4531 and the NAND Flash is a GD5F1GQ4RCYIG. The module consists of 28 Pins, 14 per side....
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2answers
595 views

router: how to break into boot?

I have an ISP-provided router, Huawei B5318-42. I connected to it through UART and a UART-USB converter, copied the output from boot, and managed to figure out which chip is the onboard flash memory. ...
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2answers
201 views

How to wire up a rotary encoder with a “0v” connection?

I have a servo motor with rotary encoder salvaged from an old scanner. I'm trying to figure out how to re-use it in a DIY CNC machine. By reading through the engineering manual from the original ...
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2answers
226 views

Limited U-Boot options, any memory reading possibilities here?

Within this very stripped down firmware I'm looking at (hikvision camera misrepresented), this is all I have to work with. No other firmware exists, and the open-seasame command presents an encrypted ...
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1answer
79 views

Dumping and reprogramming the firmware of DarenWaves

I have the following blue color lamp that can move, play music and do a few other things. I'm quite sure it has a Firmware and it's reprogrammable. I'm looking for guidance on where should I look for ...
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1answer
76 views

Is it possible to bypass the microcontroller on this massage chair without removing it?

For a research project I'm trying to create a manual control for the Chinese massage chair we've acquired, as the inbuilt controller only allows for its 5 preset programs. I am wondering what is the ...
4
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0answers
102 views

How does cartridge protection distinguish an original vs fake cartridge?

Based on what explained here, genuine ink cartridges may come with cartridge protection embedded in their chip. Once an ink cartridge is installed, printer will mark it as protected. What is ...
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0answers
32 views

Using an arduino or raspberry pi, how can I drive and control a proprietary diehen servomotor?

I’m trying to resurrect this robot from Daihen-I need to determine how this proprietary motor and encoder are wired. Anyone got experience with this?
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0answers
84 views

Need help : restoring a netgear dgn1000 v3 adsl modem/router

coming in from openwrt forum: https://forum.openwrt.org/t/trying-to-rescue-bricked-dgn1000-v3-need-help/36909 currently have serial console but i may have borked the u-boot looking for help on how to ...