2412 Results for "%E3%80%8A%EC%B5%9C%EC%A0%80%EA%B0%80 O1O%CE%9E5793%CE%9E7458%E3%80%8B %EA%B0%95%EB%82%A8%EC%95%84%EC%9D%B4%EB%A6%B0%EC%8B%9C%EC%8A%A4%ED%85%9C%E3%86%8B %EA%B0%95%EB%82%A8%EC%95%84%EC%9D%B4%EB%A6%B0%EC%85%94%EC%B8%A0%EB%A3%B8applause%EA%B0%95%EB%82%A8%EC%95%84%EC%9D%B4%EB%A6%B0%EC%8B%9C%EC%8A%A4%ED%85%9C%EA%B0%95%EB%82%A8%EC%95%84%EC%9D%B4%EB%A6%B0%EC%8B%9C%EC%8A%A4%ED%85%9C%EC%8B%A0%EC%82%AC%EC%95%84%EC%9D%B4%EB%A6%B0%EC%A3%BC%EB%8C%80caught %EA%B0%95%EB%82%A8%EC%95%84%EC%9D%B4%EB%A6%B0%E3%8F%87%E3%85%97%EA%B0%95%EB%82%A8%EC%95%84%EC%9D%B4%EB%A6%B0queer"

Reverse Engineering ROCKTECH RPI_300_EXT_V1_0
Project by Look Right
On Ebay there are some RPi4 with an nice housing and an industrial interface board. Goal is to find all information to use the board.
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Charliefoxtrot with the Embedded Controller
Log from Reverse engineering Toshiba R100 BIOS
Redford did a whole lotta work reverse engineering the BIOS code and figured out that most of the interesting stuff (password check, challenge/response for lost password) is actually done by something off the main x86 processor. We figured out that it's...

20230223a - Special Keys and File Ops
Log from ROM Disassembly - AlphaSmart Pro
While revisiting key handler handleKeyScanCode_EE37 and back annotating scan codes into the code, I wind up with this:EE37 handleKeyScanCode_EE37: EE37 13 63 01 04 brclr bCloverKeyDown_63 1 noclover_EE3F ; true if 'clover key down' EE3B 12 61 01 C9 brset...

Running short fragment of program - but needs a lot of fixing!
Log from Let's experiment: NEC V20 + FPGA
I have squeezed some simple instructions into a 16-byte ROM that writes 0x04 into the I/O address 0x00, and repeats (http://www.homebrew8088.com/):A: MOV AL, 04 OUT 00, AL JMP AThis is then converted into machine code (https://defuse.ca/online-x86-assembler.htm),...

Micro-coded controller deep-dive
Log from Custom circuit testing using Intel HEX files
In this project, instead of using a standard embedded processor and programming it to execute 3 tasks at hand (parsing HEX character stream, generating HEX character stream, and writing character stream to video RAM driving VGA), I created 3 independent...

20230216a -- RAM signature stamping
Log from ROM Disassembly - AlphaSmart Pro
Revisiting the RAM signature stamping knowing what I know now, I can better see what's going on and record that knowledge. The RAM stamping routine now looks like this:F723 ; stamp 'ram valid signature' on RAM page 0 and 3 F723 stampRAMsignature_F723:...

Different SD card MBR formats
Log from OSI SD Card Operating System (OSISDOS)
I tried a couple of other cards and found that they have different MBR formats with no header. I noted this in a previous log. There's an offset at 0x01BE that points to the MBR. My theory is this is true for "bigger" cards. I think the reason I could...

♫ Flash! (aa-aahh!) Saver of the Usersettings! ♫
Log from HP 82240B IR Receiver and Printer Interface
Summary:It occurred to me that it would be useful to save some configuration in a non-volatile manner. This board and this chip does not have any conventional non-volatile storage (e.g. EE or external serial EE), but there's plenty of pages of unused...

Building a CP/M System Disk
Log from My CP/M Single Board Computer
Building a CP/M System Disk To avoid rewriting the assembler codes for ccp, bdos and cbios so that they can co-exist in the same file. I can append the i8hex files and remove the "end of file markers". To make the hex file more readable I have changed...

Universal Power Supply
Project by oneohm
Convert whatever power source is available to the one you need
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Update Code For Three Dollar EC PPM Meter for MCU [Arduino]
Log from Hacking the way to growing food
This code is a slight update of the last one, updated:>Better Uptime Counter>LCD Shield>New Pin out Diagram>Restart Protected Calibration Details>EU and US Plug Calibrated Probe Also a quick update to the code so the calibration value will survive a...

The S/EA-X Cyberdeck
Project by Tinfoil_Haberdashery
A highly-modular ARM deck
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In The Digital Domain
Log from Reverse-Engineering the milight on-air protocol
I also wanted to sniff the communication between the micro controller and radio IC, but couldn't get the case of the remote control open. At the next opportunity I brought the Mi-Light Wi-Fi controller with me and got that open more or less easily:Inside...

20230219c -- ROM test file
Log from ROM Disassembly - AlphaSmart Pro
While whizzing through the code trying to scrounge verified keyboard scan codes and flags, I found some some buried treasure in the form of an undocumented test routine. It's not that exciting -- it just fills the current file with some sample...

Updates
Log from Latitude E6400 Coreboot port
It's been nearly 2 years since my last log, and things are quite different from where I left it. I've been poking around at this project in between other projects and university, so most of these details are not recent. I found out that there has since...

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