All posts by tallen

Capacitors

March 31, 2024 tallen

AVX – United States
Cornell-Dubilier – United States
EEStor – United States
Epcos – Germany
Europe Chemi-Con (ECC) – Japan
Elna – Japan
Hitachi – Japan
KENDEIL S.r.l. – Italy
KEMET – United States
KOA – Japan
Man Yue – China
Murata – Japan
Mouser Electronics – United States – really Mouser makes caps???
Nichicon – Japan
Nippon Chemi-Con (NCC) – Japan Very Good
Panasonic – Japan | Okay
Philips Lighting – Netherlands
Rubycon – Japan Good
Samsung – South Korea
Seacon – India? Nakamichi used these but most people say crap
Taiyo Yuden – Japan
TDK – Japan
United Chemi-Con (UCC) – Japan
Vishay – United States
Würth – Germany
Yageo – Taiwan

Defunct
Mallory – United States
Sprague – United States – widely regarded as the best
Grande Capacité – France [3]
A. H. Hunts – United Kingdom[4][5][6][7][8][9]
Procond Oy – Finland
Marcon – Bought by Nippon Chemi-con[10]

unix administration

Windows 11 QEMU Config

July 2, 2023 tallen

!/bin/bash


#!/bin/bash

        #-boot d \
        #-cdrom win_10_pro_64.iso \
        #-cdrom QuickBooks2013InstallCD.iso \
        #-monitor stdio \
        #-cdrom $HOME/ISOs/Win11_22H2_English_x64v2.iso \
        #-drive file=$HOME/VMs/Windows_C.img,format=raw,index=0,media=disk
        #-nic none \

        # TPM setup
        tmpdir=$(mktemp -d)
swtpm socket \
        --tpmstate dir=${tmpdir} \
        --ctrl type=unixio,path=${tmpdir}/swtpm-sock \
        --tpm2 &amp;

        # QEMU setup
qemu-system-x86_64 \
        -name win11 \
        -cpu host \
        -enable-kvm \
        -m 8G \
        -bios /usr/share/ovmf/OVMF.fd \
        -chardev socket,id=chrtpm,path=${tmpdir}/swtpm-sock \
        -tpmdev emulator,id=tpm0,chardev=chrtpm \
        -device tpm-tis,tpmdev=tpm0 \
        -vga vmware \
        -smp cores=2,threads=2 \
        -usb \
        -device usb-tablet \
        -device usb-host,vendorid=0x0525,productid=0xa4a1 \
        -device usb-host,vendorid=0x1c99,productid=0x0002 \
        -device usb-host,vendorid=0x058f,productid=0x6387 \
        -rtc clock=host,base=localtime \
        -drive file=$HOME/VMs/Windows11.qcow2,format=qcow2,index=0,media=disk
~

#!/bin/bash

#-boot d \

#-cdrom win_10_pro_64.iso \

#-cdrom QuickBooks2013InstallCD.iso \

#-monitor stdio \

#-cdrom $HOME/ISOs/Win11_22H2_English_x64v2.iso \

#-drive file=$HOME/VMs/Windows_C.img,format=raw,index=0,media=disk

#-nic none \

# TPM setup

tmpdir=$(mktemp -d)

swtpm socket \

--tpmstate dir=${tmpdir} \

--ctrl type=unixio,path=${tmpdir}/swtpm-sock \

--tpm2 &

# QEMU setup

qemu-system-x86_64 \

-name win11 \

-cpu host \

-enable-kvm \

-m 8G \

-bios /usr/share/ovmf/OVMF.fd \

-chardev socket,id=chrtpm,path=${tmpdir}/swtpm-sock \

-tpmdev emulator,id=tpm0,chardev=chrtpm \

-device tpm-tis,tpmdev=tpm0 \

-vga vmware \

-smp cores=2,threads=2 \

-usb \

-device usb-tablet \

-device usb-host,vendorid=0x0525,productid=0xa4a1 \

-device usb-host,vendorid=0x1c99,productid=0x0002 \

-device usb-host,vendorid=0x058f,productid=0x6387 \

-rtc clock=host,base=localtime \

-drive file=$HOME/VMs/Windows11.qcow2,format=qcow2,index=0,media=disk

Hardware Hacking

Sergei Skorobogatov Papers

June 21, 2023 tallen

Breakthrough Silicon Scanning Discovers Backdoor in Military Chip (slides)

Breakthrough Silicon Scanning Discovers Backdoor in Military Chip

The bumpy road towards iPhone 5c NAND mirroring

citations

Hardware Hacking

decapping / delidding

May 26, 2023 tallen

Fuming Nitric Acid = 90%
epoxy only (no ceramic)
plastic = epoxy-cresol-novolak (ECN)

Hardware Hacking

Useful Sites

May 26, 2023 tallen

https://limitedresults.com/

Hardware Hacking

CRC Reverse Engineering

May 26, 2023 tallen

This bit of C, among other things, takes some bytes in hex followed by a CRC and figures out which CRC method was used.

https://reveng.sourceforge.io/

embedded, FPGA / Verilog / HLS

Dream Source Labs… so you thought Saleae sucked

May 16, 2022 tallen

When you untar the archive and everything’s marked executable, you know you’re in for a hard time. There is nothing easy or convenient about this thing.

Having said that it does work with Sigrok and Sigrok knows a lot of protocols. PulseView (the GUI front end to Sigrok) is okay but for heavy lifting you probably want sigrok-cli.

I just found it difficult to put the firmware (gateware for the FPGA) in the correct place–why don’t these things (Saleae’s the same way) just store the FPGA gateware in flash? Lastly, there are some things I like better about the Saleae’s software.

Not Facebook

Remnants of a homeschool “lecture”

April 18, 2022 tallen

..actually three separate impromptu lectures, my 12 year old wanted to know something and the window served as “whiteboard”

Not Facebook

Ohio’s legislature does something of which I approve

April 14, 2022 tallen

I think they call this “road tax.” Money is fungible people. …and they have funged it all over the place! So ignore the bottom three lines

programming

.gitconfig

May 25, 2021 tallen

[alias]
lllog = log --oneline --decorate --all --graph
llog = log --graph --pretty=format:'%C(yellow)%h%Creset -%C(red bold)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --all -n15
dlog = log --graph --pretty=format:'%cD %C(yellow)%h%Creset -%C(red bold)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --all -n15
[user]
email = tim.allen@base2engineering.com
name = Tim Allen
[color]
ui = auto
[color "branch"]
current = yellow reverse
local = yellow
remote = green
[color "diff"]
meta = yellow bold
frag = magenta bold
old = red bold
new = green bold
[color "status"]
added = yellow
changed = green
untracked = cyan
[core]
autocrlf = input

[alias]

lllog = log --oneline --decorate --all --graph

llog = log --graph --pretty=format:'%C(yellow)%h%Creset -%C(red bold)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --all -n15

dlog = log --graph --pretty=format:'%cD %C(yellow)%h%Creset -%C(red bold)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --all -n15

[user]

email = tim.allen@base2engineering.com

name = Tim Allen

[color]

ui = auto

[color "branch"]

current = yellow reverse

local = yellow

remote = green

[color "diff"]

meta = yellow bold

frag = magenta bold

old = red bold

new = green bold

[color "status"]

added = yellow

changed = green

untracked = cyan

[core]

autocrlf = input

!/bin/bash

My CV