ℍ𝕎ℝØ

@r0_hw

Hardware, Reverse Engineering, Security, Crypto, Radio/Sat & SIGINT Nerd. Fuzzing with everything. Vintage Pocket Computers / ポケコン X-Ray / SEM / Echo Chamber

Vrijeme pridruživanja: studeni 2016.

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  1. Prikvačeni tweet
    20. sij

    My Vintage Pocket Computer (ポケコン) collection (90% of it) - functional! Sharp PC-1600/1500/E500/G850V* (4 coming next month) Casio PB-1000/2000C/VX-4/Z-1/FX-890P HP-95LX/200LX TRS-80 Model100 + clones (3 coming next month) Soviet Elektronika MK 52/61/85/90 +Voyage200 I forgot

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  2. proslijedio/la je Tweet
    prije 1 sat

    MacGyver engineering with at Brussels Airport. Charging a Baofeng with duty-free material only. Pencil lead as current limiting resistor, pencil sharpener blade as wire stripper. Two USB powerbanks in series to get 10V, USB power monitor as amp-meter

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  3. proslijedio/la je Tweet
    29. sij

    Implemented a PoC for disabling kernel lockdown on Ubuntu via a keyboard emulated through USB/IP, CC

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  4. prije 6 sati

    4x1024KBits of Storage (I2C EEPROM) powered by Casio Calculator

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  5. prije 6 sati
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  6. prije 6 sati

    One last thing for today Casio PB1000/2000C related : The MD-100 (floppy)emulator, inspired from Piotr's site. I will rework it to store the files on uSD, and maybe so it makes also sounds like a floppy drive ! 🤣

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  7. prije 8 sati
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  8. prije 8 sati

    Here 2 more X-Rays of Casio Pocketcomputers First is the PB-2000C (was repairing the connecting cables between the 2 halves) Second one is the FX-890P, the first Japanese 16bit Pocketcomputer (80C186 Processor)

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  9. proslijedio/la je Tweet

    Башня в Сити отбрасывает тень на небесную твердь. Шах и мат, аметисты

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  10. proslijedio/la je Tweet
    2. velj

    haha excellent ! Le gars se balade sur les routes avec son wagonnet, et Maps pense que le trafic est saturé, il oriente donc les conducteurs sur d'autres routes :p

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  11. proslijedio/la je Tweet
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  12. proslijedio/la je Tweet
    2. velj

    Finally released part 2 of my »Reversing with « series! In this video we reverse engineer some of the integrated decryption methods and see how we can easily analyze C++ code in Ghidra.

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  13. proslijedio/la je Tweet
    27. sij

    New cache attack against Intel CPUs:

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  14. proslijedio/la je Tweet
    2. velj

    Open/Closed Sign Source: Quintox303/Thingiverse

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  15. 2. velj

    Ping 😀

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  16. 2. velj

    : **Casio PB-1000** (Basic & Assembler) Pocket Computer from 30 years ago under the X-Ray 915kHz(!) Core Frequency 8K+32K(Extension) RAM 6K internal ROM 192x32 Screen with 4x4 touch "fields"

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  17. proslijedio/la je Tweet
    2. velj

    These guys deserve their own marvel movie.

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  18. 2. velj

    My discovery today : Both are DIP64 chips (MC68k and YM2608B, a soundchip common to the NEC8801/9801) Only the 68K is a "standard" DIP64 in 2.54mm pitch, the YM however has a 1.78mm pitch !!!

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  19. proslijedio/la je Tweet

    Honestly, if your threat model doesn't include at least a few situations where the outcome is: "You are fucked" You are not doing it right.

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  20. proslijedio/la je Tweet
    1. velj

    The analog computer we're restoring has a digital section with eight flip flops and 8-bit counter. We replaced bad capacitors in the power supply.Also replaced a burnt-out bulb with the last spare we had, but another burned out a few minutes later :-(

    The analog computer is the size of a mini-fridge. The cover is removed, showing the circuitry inside.
    The power supply board for the digital section. We replaced the three blue filter capacitors that went bad. The board has a large transistor on a heat sink.
    The digital section is programmed by a patch panel. 16 lights to the left show the status of the flip flops and counter.
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  21. proslijedio/la je Tweet
    1. velj

    Video showing the analog computer's digital counter, wired to the 100 Hz clock, counting down from 255. The digital section has some intermittent problems, maybe due to oxidized connectors. The oscillator quit working shortly after this video.

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