1532 Results for "%E3%80%8A%EC%B5%9C%EC%A0%80%EA%B0%80 O1O%CE%9E5793%CE%9E7458%E3%80%8B %ED%8D%BC%EB%B8%94%EB%A6%AD%EC%85%94%EC%B8%A0%EB%A3%B8%EC%B0%A8%EC%9D%B4%C5%8B %E3%80%8A%EC%B5%9C%EC%A0%80%EA%B0%80 O1O%CE%9E5793%CE%9E7458%E3%80%8B %E2%87%92silver%E3%8F%82%ED%8D%BC%EB%B8%94%EB%A6%AD%EC%88%A0%EC%A7%91%EC%84%A0%EB%A6%89%ED%8D%BC%EB%B8%94%EB%A6%AD%E3%85%9Eproprietary %ED%8D%BC%EB%B8%94%EB%A6%AD%EC%88%A0%EC%A7%91%ED%8D%BC%EB%B8%94%EB%A6%AD%EC%85%94%EC%B8%A0%EB%A3%B8%EC%B0%A8%EC%9D%B4 %EC%84%A0%EB%A6%89%ED%8D%BC%EB%B8%94%EB%A6%AD%C2%B9%ED%8D%BC%EB%B8%94%EB%A6%AD%EC%97%85%EC%86%8C%EC%8B%9C%EC%8A%A4%ED%85%9C%EF%BD%97sworn%E3%86%89"

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...

20230225a - Displaying the Current File
Log from ROM Disassembly - AlphaSmart Pro
sub_F374 has caught my interest because it seems to be painting the LCD with the currently selected file's contents according to several state variables that I have not fully reverse-engineered.The routine begins like this:F374 sub_F374: F374 BD F6 18...

The actual informations
Log from Extension card for TDS3000 scopes
Detecting and identifying a card As stated in an earlier log, the card insertion is detected by grounding the pin *CD. But this is not enough to make the scope believe he have a know card inside him. You need to indicate him what type of card was inserted....

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...

Interfacing ternary and binary components
Log from Homebrew ternary computer
Ok, now it is kind of proven that binary CPLD (or FPGA) may implement ternary logic, but how we can integrate it with "true" ternary components, especially when CPLD is 3.3V and TRIMUXes are -5V and +5V? Answer is DG403 chips may do the job: Because...

20230214a -- Memory, cont.
Log from ROM Disassembly - AlphaSmart Pro
Operating under the current assumption that RAM is 32 KiB banked at address 0000-7fff, with the first 256 bytes masked off by special function registers and internal SRAM, some other code sections of interest were found. E.g.:ED00 loc_ED00: ED00...

Understanding how the computer works
Log from Apollo Guidance Computer
Fortunately most of the NASA documents are available. They can be found on-line at https://www.ibiblio.org/apollo/Documents/ The following documents are what I leaned heavily on in gaining an understanding of how this computer...

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:...

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...

20230222b A Tale of Two Translations
Log from ROM Disassembly - AlphaSmart Pro
There are several translation routines found during the file sending stuff that translate one character value into another one. Some we understand, like this one:F4DC sub_F4DC: F4DC 84 7F anda #$7F ; reset high bit F4DE 16 tab F4DF 4F clra F4E0...

Three Dollar EC - PPM Meter [Arduino]
Log from Hacking the way to growing food
This Blog will Cover How to build a cheap EC meter for your aquaponics/Hydroponics or water quality related projects. We are not going to get into what the ideal value of PPM or EC is, Just cover how to measure and quantify a fluid.We will be using this...

Self Optimising Automated Arduino Nutrient Doser
Log from Hacking the way to growing food
This Blog is about making a nutrient dosing system for hydroponics that is plug and play, I didnt quite get it to the full stage of plug and play with this version. But it is almost there. Because the change of nutrient strength of our systems can be...

20230213b -- Memory
Log from ROM Disassembly - AlphaSmart Pro
I find it vexing that I have not yet figured out the RAM banking scheme. Some things:at reset, the peripheral configuration registers and internal RAM are mapped at 0000h. They can be moved elsewhere, but are not. The RAM at 40-ff is...

EC or not EC: that is the question
Log from SpiroBoard Aeroponics pH / EC / Motor Controller
For some reason, EC probes are relatively expensive. In most cases they are more expensive than pH probes, which to me seem a lot harder to make. So, I decided to make my own EC probe, as you can see below:The contacts are gold plated Studex ear piercing...

Theory
Log from All About Laptop Keyboard Reuse
A laptop keyboard is a diode-less key matrix. Its keys are distributed in a way that you can press the most important key combinations at once, despite the lack of diodes - to the point where some rows only contain one or two keys. Often, there's also...

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