What is Memory Mapped I/O? (16-Bit VM in JavaScript 005) Low Byte Productions 2019-12-25 | This this episode we implement memory mapped I/O, where the address space is utilised as common bus for components to communicate.=[ ℹ About ℹ ]=This series is all about building a powerful virtual machine in JavaScript with the following features:- A flexible, extensible, register-based virtual machine- Support for signed, unsigned and floating point operations- A call stack - Interrupt capabilities- Ability to do memory mapping for IO- An assembly language with macro and module support- A higher level, C like language. We'll use and expand the library from the parser combinators from scratch series- And finally, to be able to take the whole thing into the browser and exend it to create a sort of fantasy console - an emulator for a machine that never existed=[ 🔗 Links 🔗 ]=- ⭐️ Patreon: patreon.com/lowleveljavascript- 💌 Updates to your inbox: tinyletter.com/lowleveljavascript- Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW5DdwpdwHCRJsEubS5NrQ9b&playnext=1&index=1- Github Repo: github.com/LowLevelJavaScript/16-Bit-Virtual-Machine- Memory Mapped IO: en.wikipedia.org/wiki/Memory-mapped_I/O- Address Space: en.wikipedia.org/wiki/Address_space
Fixed-point math is better than floating point (sometimes) Low Byte Productions 2024-06-22 | In this video, we're learning about fixed-point: A different method for doing non-integer arithmetic without floats!Floating point is a ubiquitous standard that works everywhere, but it needs specialised hardware to have any chance of running fast. This can make calculations on low-powered microcontrollers extremely expensive. Fixed-point solves, giving us a method for cheaply computing fractional results with flexible precision! 00:00:00 Intro00:03:46 Floating point vs fixed point00:10:07 Fixed point bit representation00:17:10 Code: Fixed point defines00:21:30 Getting to the integer and fractional parts00:24:24 Sign function and representing ints in fixed point00:32:14 Converting to and from floating point00:36:23 Addition and subtraction00:38:27 Multiplication00:42:20 Division00:48:52 Rounding operations00:50:14 Absolute value00:54:50 Floor00:58:57 Getting the fractional part01:02:38 Ceiling01:05:37 Round01:14:14 Motivating example: Analog to digital converter readings01:30:10 Next time: Sines and cosines=[ 🔗 Links 🔗 ]= ⭐️ Become a patron and get bonus videos! patreon.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk💻 Github Repo: github.com/lowbyteproductions/fixed-point-math
Rendering 3D Graphics On An Oscilloscope Low Byte Productions 2024-03-08 | In this video, we're learning how to draw on an oscilloscope. By utilising the X-Y mode of the scope, combined with some clever firmware to generate the right signals, and a sprinkle of DIY digital-to-analog conversion, we can render animated 3D graphics on a scope in real time!00:00:00 3D Animated Demo00:01:36 Understanding X-Y Mode00:05:00 Firmware Architecture Overview00:09:52 PWM Digital-to-Analog Conversion00:14:48 Manually creating images00:21:57 Visualizing the signals00:25:03 Writing the static image firmware00:48:30 PWM signals on the scope00:51:14 Building the low-pass filters00:58:42 First 3D image01:03:30 Reading the 3D renderer firmware code01:17:15 Final demo=[ 🔗 Links 🔗 ]= ⭐️ Become a patron and get bonus videos! patreon.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk💻 Github Repo: github.com/lowbyteproductions/3d-oscilloscope-renderer
Using LEDs As Precise GPIOs Low Byte Productions 2024-02-17 | In this video, we're looking at a technique for precisely analyzing signals from firmware when all you can do is blink a LED. By writing to an LED as if it were a typical GPIO, and building a surprisingly simple receiver, we can probe signals with an oscilloscope without even touching the board!=[ 🔗 Links 🔗 ]= 🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript
Bare Metal Bit Banging: WS2812B Driver Low Byte Productions 2023-12-30 | In this video, we examine the WS2812B RGB LED device, and write a bit-banged driver from scratch for an STM32 microcontroller.Chapters00:00 What is a WS2812 / NeoPixel02:33 Hardware overview06:00 What is a "device driver"?08:35 The signalling protocol15:00 Reviewing the datasheet22:00 Figuring out the GPIO timing49:32 First LED test53:36 Implementing the driver interface=[ 🔗 Links 🔗 ]= 🎥 Bare metal playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/stm32-ws2812b
Spinning Persistence of Vision Low Byte Productions 2023-12-24 | The letters are distorted because the outside of a circle spins faster than the inside. There is currently no syncing to the frequency of rotation, which is why the text processes.
Getting up in another processes memory Low Byte Productions 2023-11-04 | In this video, we learn how we can read memory belonging to other processes by building a memory dumper from scratch.One of the key components is the /proc file system: an interface that the kernel provides for introspecting processes. Combined with ptrace, a system call that allows attaching to and taking control of another process, we write a program to automate extracting information that would otherwise be completely hidden to us!=[ 🔗 Links 🔗 ]= https://j3s.sh/thought/recover-lost-text-by-coredumping-firefox.html🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/memory-dumper
The mechanics of VIRTUAL MEMORY //Source Dive// 005 Low Byte Productions 2023-10-28 | In this installment of //Source Dive//, we're back in xv6, learning how address translation works with the virtual memory subsystem.=[ 🔗 Links 🔗 ]= more in depth talk: youtu.be/dFIqNZ8VbRY?si=ZGKcZRex96AUtwlT🐋 RISC-V Docker Image: github.com/francisrstokes/rv-toolchain-docker/pkgs/container/rv-toolchain-docker🎥 Series Playlist: 🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/mit-pdos/xv6-riscv
Turning Pixels Into Waves Low Byte Productions 2023-10-21 | In this video, we're building an awesome graphical effect, where an image is processed into a series of animated waves. The math behind the technique is fascinating, and will lead us into to how sine waves work, the magic of linear interpolation, and signal processing techniques like amplitude modulation!=[ 🔗 Links 🔗 ]= 🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/Turning-Pixels-Into-Waves
How does KERNEL memory allocation work? //Source Dive// 004 Low Byte Productions 2023-10-13 | In this installment of //Source Dive//, we're deep in the xv6 operating system, trying to understand how physical memory of the system is tracked, distributed, and returned to the kernel. It's a fascinatingly simple algorithm, which can be paradoxically kind of hard to understand! =[ 🔗 Links 🔗 ]= 🐋 RISC-V Docker Image: github.com/francisrstokes/rv-toolchain-docker/pkgs/container/rv-toolchain-docker🎥 Series Playlist: 🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/mit-pdos/xv6-riscv
Virtual Console and printf() //Source Dive// 003 Low Byte Productions 2023-09-30 | In this installment of //Source Dive//, we're back in xv6, looking at how the operating system layers abstractions. The "console" is a great example, with a low-level driver rooted in the hardware, to an abstract console, to the printf function that eventually outputs characters to the screen. =[ 🔗 Links 🔗 ]= 🐋 RISC-V Docker Image: github.com/francisrstokes/rv-toolchain-docker/pkgs/container/rv-toolchain-docker🎥 Series Playlist: 🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/mit-pdos/xv6-riscv
Programmatic Painting: Flow Fields Low Byte Productions 2023-09-23 | In this video, we're drawing generative art in the form of flow fields! Flow fields are mathematical structures where every point of a space is associated with an angle, and by carefully choosing those angles, we can trace out the path of particles moving across the field, creating some beautiful images.=[ 🔗 Links 🔗 ]= 🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/flow-fields
What is a spinlock? //Source Dive// 002 Low Byte Productions 2023-09-16 | In this installment of //Source Dive//, we're back in the xv6 OS codebase, exploring timers, the early boot process, and a very useful concurrency primitive: The Spinlock!=[ 🔗 Links 🔗 ]= 🐋 RISC-V Docker Image: github.com/francisrstokes/rv-toolchain-docker/pkgs/container/rv-toolchain-docker🎥 Series Playlist: 🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/mit-pdos/xv6-riscv
How does an OS boot? //Source Dive// 001 Low Byte Productions 2023-09-09 | In this installment of //Source Dive//, we're learning about the xv6 Operating System; Specifically the low-level boot code that gets the CPU in the correct state to run the OS!=[ 🔗 Links 🔗 ]= 🐋 RISC-V Docker Image: github.com/francisrstokes/rv-toolchain-docker/pkgs/container/rv-toolchain-docker🎥 Series Playlist: 🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/mit-pdos/xv6-riscv
Cryptographically Signed Firmware :: Bare Metal Programming Series 14 Low Byte Productions 2023-08-06 | In the final episode of the Bare Metal Programming Series, we're implementing signed firmware updates! Everything from using AES in the CBC-MAC configuration in the bootloader, to writing a signing application, to updating the firmware updater to work with the new images.And of course, where would we be without a false celebration before the ultimate solution 😉 =[ 🔗 Links 🔗 ]= AES Blog Post: github.com/francisrstokes/githublog/blob/main/2022/6/15/rolling-your-own-crypto-aes.mdSpec: nvlpubs.nist.gov/nistpubs/fips/nist.fips.197.pdfDeeper justifications and analysis: csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/aes-development/rijndael-ammended.pdfAttacking AES with power analysis: youtube.com/watch?v=5Hn2D5lrzVo🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Understanding AES Encryption Mechanics: BMPS Low Byte Productions 2023-07-29 | In this video we're taking some time to grok the mechanics of AES. We cover the core operations of the algorithm, the mathematics of finite fields, and the all-important modes of operation.=[ 🔗 Links 🔗 ]= AES Blog Post: github.com/francisrstokes/githublog/blob/main/2022/6/15/rolling-your-own-crypto-aes.mdSpec: nvlpubs.nist.gov/nistpubs/fips/nist.fips.197.pdfDeeper justifications and analysis: csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/aes-development/rijndael-ammended.pdfAttacking AES with power analysis: youtube.com/watch?v=5Hn2D5lrzVo🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Maintaining Firmware Integrity :: Bare Metal Programming Series 12 Low Byte Productions 2023-07-15 | In this episode, we add a mechanism to ensure that a firmware was properly transferred during an update. Problems can occur if power is lost during an update, or the cable connection is dropped. By checking the main application integrity in the bootloader before executing it, we can prevent potentially dangerous situations.=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
First Successful Firmware Update! :: Bare Metal Programming Series 11 Low Byte Productions 2023-07-02 | In this episode, we're building the firmware updater application, which communicates with the bootloader in order to send a firmware update reliably over USB/UART. It's a fun break from writing low level C, and a chance to write some code in language that provides nice abstractions for sequencing asynchronous code! =[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Bootloader Firmware Update Mechanism :: Bare Metal Programming Series 10 Low Byte Productions 2023-06-24 | In this episode, we're finally building the core firmware update mechanism in the bootloader! This involves taking all the elements we've been working on until now - timers, state machines, the packet protocol on top of uart, etc - and putting them together into a bootloader firmware that is able to communicate with a host PC and receive a firmware update.In the next video, we'll build the PC side application, and complete this major milestone, before moving on to implementing a cryptographic code signing mechanism, to ensure only authorised code can be loaded onto the device.=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Simple Timer API :: Bare Metal Programming Series 9 Low Byte Productions 2023-06-17 | In this installment of the bare metal programming series, we're taking a minute to build a very simple timer API, allowing us to quickly setup, check, and reset software based timers - accounting for any drift that may occur between checks!=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Programmatic Flash Control :: Bare Metal Programming Series 8 Low Byte Productions 2023-06-06 | In this installment of the bare metal programming series, we're diving into how the flash peripheral of the STM32F401 chip works, and building out a little layer to be able to write a new main application from the bootloader. This serves as an excellent opportunity to cross reference the details of the reference manual with the APIs provided by libopencm3 - going from a register level understanding, to a higher level implementation!=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Testing the Packet Protocol :: Bare Metal Programming Series 7.3 Low Byte Productions 2023-05-30 | In this installment of the bare metal programming series, we're testing the packet protocol implementation we wrote in the bootloader, using a PC side application which will eventually become the firmware updater!Turns out there were a few bugs - but being able to step though both programs at the same time, seeing how the data flows, allows us to iron those out.=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Bootloader Packet Protocol Implementation :: Bare Metal Programming Series 7.2 Low Byte Productions 2023-05-22 | In this episode of the bare metal programming series, we're implementing the packet protocol we looked at in the previous video inside the bootloader.This protocol is able to automatically process incoming packets, acknowledging or requesting retransmission (or retransmitting when requested), and stuffing the data into a buffer for the application logic to use. =[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Designing A Packet Protocol :: Bare Metal Programming Series 7.1 Low Byte Productions 2023-05-15 | In this episode of the bare metal programming series, we're going over the design of a packet protocol, that runs on top of the UART physical layer we've been building up over the last few videos.This protocol consists of a binary packet format, which includes a mechanism for validating the integrity of a packet, as well as a state machine for processing incoming packets, validating them, and automatically requesting retransmission if the packet fails the check.=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Interrupt Safe Ring Buffer :: Bare Metal Programming Series 6 Low Byte Productions 2023-05-08 | In this episode of the bare metal programming series, we're building a ring buffer to back our UART driver. This buffer comes with a set of operations and properties that make it safe and consistent to use from both the main code and interrupt routines.=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
UART Driver From Scratch :: Bare Metal Programming Series 5 Low Byte Productions 2023-04-30 | In this episode of the bare metal programming series, we're building a UART driver - an API to the peripheral which will facilitate the fundamental communications we'll need for firmware updates in the bootloader!=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Understanding Assembly Generated From C :: Bare Metal Programming Series 4.1 Low Byte Productions 2023-04-22 | In this (micro) episode of the bare metal programming series, we're looking at different ways of expressing the same idea in C, and reading the resulting assembly code in order to make sense of any differences.Being able to read assembly (if not write it) is a valuable skill - and can help tremendously in both debugging and making sensible performance optimisations. =[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Worlds Simplest Bootloader :: Bare Metal Programming Series 4 Low Byte Productions 2023-04-16 | In this episode of the bare metal programming series, we're taking our first steps into building a fully fledged bootloader! To do this, we need to split the application in two, build some supporting scripts, learn how to use linker scripts, and understand some of the internal CPU registers for relocating the interrupt vector table at runtime.=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
PWM and Timers :: Bare Metal Programming Series 3 Low Byte Productions 2023-04-09 | in this episode of the bare metal programming series, we're examining PWM, or pulse width modulation: a technique for creating repeating square-wave like signals with a variable duty cycle.PWM is just one function of the built in "Timer" peripheral, which, as the name implies, is able to keep very accurate time. =[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Interrupts and Memory Mapped I/O :: Bare Metal Programming Series 2 Low Byte Productions 2023-03-21 | This is episode 2 of the bare metal programming series! In this video, we're taking a deep dive into the memory-mapped I/O mechanism that underpins the CPUs communication with the peripherals on the chip. We also discuss and explore interrupts and the interrupt vector table, as well where to find the fundamental information related to your chip: datasheets and reference manuals.=[ 🔗 Links 🔗 ]= Bit Hacks (Beginner to Advanced) video by Creel: youtube.com/watch?v=ZRNO-ewsNcQDemystifying bitwise operations blog post by Andrei Ciobanu: andreinc.net/2023/02/01/demystifying-bitwise-ops🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Hello World Blinky! Bare Metal Programming Series 1 Low Byte Productions 2023-03-12 | This is episode 1 of the bare metal programming series! Over the next few videos, we're going to be building firmware for a Cortex-M4 STM32 processor (STM32F401RE).We'll cover:- Installing and compiling libopencm3- Setting up the core system clock- Configuring a GPIO- Writing a roughly accurate time delay function- Blinking a LED=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Bare Metal Programming Series 0 Low Byte Productions 2023-03-12 | This is episode 0 of the bare metal programming series! Over the next few videos, we're going to be building firmware for a Cortex-M4 STM32 processor (STM32F401RE).This video introduces:- the series- what we'll be covering- who the intended audience is- the goals and the non-goals- the hardware you'll need to follow along=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/playlist?list=PLP29wDx6QmW7HaCrRydOnxcy8QmW0SNdQ🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/bare-metal-series
Hiding Data In Sound Low Byte Productions 2023-01-19 | In this video, we're learning about steganography: the art of hiding data inside other data.=[ 🔗 Links 🔗 ]= 💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/Hiding-Data-In-Sound
Dumping GameBoy Cartridges The INTERESTING Way Low Byte Productions 2022-12-13 | In this video we're dumping GameBoy cartridges using a non-conventional method; One that uses the GameBoy itself to exfiltrate the data out from under it!It's going to involve building custom software that runs on the console, cartridge swapping, and the fabled link cable.00:00:00 – Intro00:02:12 – GameBoy Coding Adventure Book00:03:18 – The plan00:09:52 – Writing the ROM dumper code01:14:28 – The GameBoy link port and cable01:17:52 – Wiring up to the logic analyzer01:21:18 – Logic SPI setup01:25:45 – Dumping the ROM01:31:40 – Processing the dump into a raw binary file01:40:12 – Testing in an emulator=[ 🔗 Links 🔗 ]= 📖 GameBoy Coding Adventure: mdagois.gumroad.com/l/CODQn (Use code LBP for discount)🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/francisrstokes/tega
I wrote a GameBoy game in TypeScript (And it runs on real hardware!) Low Byte Productions 2022-11-28 | =[ 🔗 Links 🔗 ]= 💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo (emulator): github.com/francisrstokes/tega00:00:00 – Intro00:05:23 – Demo on real hardware00:06:48 – TEGA Overview00:08:22 – Modules! No linker required00:11:18 – Loads, Stores, and instruction representability00:21:05 – Arithmetic and Logic00:25:17 – Jumps, Labels, and Branches00:29:45 – Macro abstraction examples00:39:28 – Building a ROM00:45:16 – The GameBoy Memory Map00:56:58 – Block Jump Code Overview01:05:39 – Tile graphics01:12:26 – The DMA routine, and virtual symbol offsets01:19:19 – Setting up the LCD screen01:23:52 – Organising values in RAM01:29:22 – Setting up OAM01:33:34 – Setting up the player character and obstacle structs01:35:26 – The main game loop01:38:08 – Random Number Generation01:42:26 – Game State Machine01:53:23 – Jump Physics02:05:43 – Compression: Encoding side02:12:42 – Compression: Decoding side02:17:59 – Running and Debugging in an emulator02:30:50 – Outro
ROM Hacking: Exploring The BPS Binary Patch Format Low Byte Productions 2022-11-01 | In this video, we're exploring the BPS binary patch format, used extensively in the ROM hacking scene. BPS has a number of improvements over the IPS format we looked at in a previous installment, offering better composition, compression, and error checking.=[ 🔗 Links 🔗 ]= 💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/BPS-Patcher
Binary Patching: How The IPS Format Works Low Byte Productions 2022-10-20 | In this video, we're taking a deep dive into the IPS format, and building a compliant parser and patcher in the C programming language!IPS is a relatively old and simple format, and not in widespread use these days, but taking a look at the details provides a lot of insight into the subject, as well as a clear direction for the formats that succeeded it.=[ 🔗 Links 🔗 ]= 💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: pawww.patreon.com/lowleveljavascript💻 Github Repo: github.com/lowbyteproductions/IPS-Binary-Patcher
The End Of Low Level JavaScript Low Byte Productions 2022-10-09 | Low Level JavaScript is no more.=[ 🔗 Links 🔗 ]= 💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript
gateware-ts basics: Digital design for FPGA with TypeScript Low Byte Productions 2022-06-24 | In this video, we're taking going into the basics of modular digital design with the gateware-ts library.Some of the tools/hardware used in this video, and how to install them:- 1bitsquared.com/products/icebreaker- http://bygone.clairexen.net/icestorm- http://iverilog.icarus.com- http://gtkwave.sourceforge.net=[ 🔗 Links 🔗 ]= 💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: TODO
Announcement: The Low Level Jam! Low Byte Productions 2022-06-14 | On Friday June 17 2022, this channel is proud to be hosting the first Low Level Jam!Organised by Nate Catelli (github.com/ncatelli), the event takes place over 7 days, with each participant using a maximum of 48 hours to develop their project. You will find everything you need to know about the event on the official github page github.com/LowLevelJam/LLJam0001Find a team, ask for help, or just come to chat over at the discord server discord.gg/59tmtaQe3X.Hope to see you there, and can't wait to see what you come up with!
The Emulator Is Done?!: RISC-V ep.12 Low Byte Productions 2022-05-18 | In this final installment of the RISC-V (emulator) series, we implement a multi-cycle memory interface. With this in place, the design is complete enough to move forward and begin design honest-to-goodness FPGA hardware!=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/watch?v=ER7h4ZTe19A&list=PLP29wDx6QmW4sXTvFYgbHrLygqH8_oNEH💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo (emulator): github.com/LowLevelJavaScript/RISC-V-Emulator
The Last Instructions!: RISC-V ep.11 Low Byte Productions 2022-05-09 | In this installment of the RISC-V series, we're _finally_ implementing the very last instructions! Additionally, we add a reset mechanism to the pipeline stages in order to prevent hazardous conditions when dealing with traps.=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/watch?v=ER7h4ZTe19A&list=PLP29wDx6QmW4sXTvFYgbHrLygqH8_oNEH💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo (emulator): github.com/LowLevelJavaScript/RISC-V-Emulator
Exceptional Trap Handling: RISC-V ep.10 Low Byte Productions 2022-04-27 | In this episode of the RISC-V quest, we're implementing the mechanics of trap handling, taking one particularly easy to spot exception as the focus point: Load Address Misaligned.The design involves building a new module, as well as a new super-state of the CPU, which controls when the processor is executing the pipeline, and when it is handling the mechanics of traps.=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/watch?v=ER7h4ZTe19A&list=PLP29wDx6QmW4sXTvFYgbHrLygqH8_oNEH💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo (emulator): github.com/LowLevelJavaScript/RISC-V-Emulator
Machine Mode, Traps, Compilation, and Linking: RISC-V ep.9 Low Byte Productions 2022-04-20 | In this video, after something of a hiatus, we're getting backing into the RISC-V swing!We're diving into machine mode, the associated CSRs, and how they relate to next big piece of functionality we'll be tackling: Traps - Exceptions and Interrupts.We also take a deep dive into the memory map of the design, relating it to the compilation and linking of the C and assembly code that will run on the processor.=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: youtube.com/watch?v=ER7h4ZTe19A&list=PLP29wDx6QmW4sXTvFYgbHrLygqH8_oNEH💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo (emulator): github.com/LowLevelJavaScript/RISC-V-Emulator
Unpacking squished bits (Bit Packer part 2) Low Byte Productions 2022-04-16 | In this video, we're writing the unpack half of the Bit Packer API, where we can recognise patterns in the bitstream, and return the value they actually represent!=[ 🔗 Links 🔗 ]= 🎥 Series Playlist: 💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/LowLevelJavaScript/Bit-Packer
[stream] Exploring the FT232H and Node Native Addons Low Byte Productions 2022-03-27 | =[ 🔗 Links 🔗 ]= 🎥 Stream Playlist: youtube.com/playlist?list=PLP29wDx6QmW7jg0LgRJYAmHLM6G_6NDw6💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo:
[stream] More USB Reverse Engineering + Drivers Low Byte Productions 2022-03-12 | =[ 🔗 Links 🔗 ]= Edgeguard Keyboard Adapter: keyboard.ggebpf-usb: github.com/francisrstokes/ebpf-usbeBPF: ebpf.ioBook: USB Complete by Jan AxelsonMarcan reverse engineering a MIDI controller: youtube.com/watch?v=cUVuTBH51GYUSB 2.0 Spec: usb.org/document-library/usb-20-specificationBlog with useful resources: hackernoon.com/usb-reverse-engineering-down-the-rabbit-hole-c4809a5b55c4GreatFET: greatscottgadgets.com/greatfet🎥 Stream Playlist: youtube.com/playlist?list=PLP29wDx6QmW7jg0LgRJYAmHLM6G_6NDw6💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/francisrstokes/GMMK-Driver
[stream] USB: Reverse Engineering and Writing Drivers Low Byte Productions 2022-02-26 | =[ 🔗 Links 🔗 ]= Book: USB Complete by Jan AxelsonMarcan reverse engineering a MIDI controller: youtube.com/watch?v=cUVuTBH51GYUSB 2.0 Spec: usb.org/document-library/usb-20-specificationBlog with useful resources: hackernoon.com/usb-reverse-engineering-down-the-rabbit-hole-c4809a5b55c4GreatFET: greatscottgadgets.com/greatfet🎥 Stream Playlist: youtube.com/playlist?list=PLP29wDx6QmW7jg0LgRJYAmHLM6G_6NDw6💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo: github.com/francisrstokes/GMMK-Driver
[stream] File System Hacking: FAT32 Deep Dive Low Byte Productions 2022-02-20 | =[ 🔗 Links 🔗 ]= 🎥 Stream Playlist: youtube.com/playlist?list=PLP29wDx6QmW7jg0LgRJYAmHLM6G_6NDw6💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo:
[stream] File System Hacking: Building A FAT32 Layer On Top Of The SD-Card Driver Low Byte Productions 2022-02-12 | =[ 🔗 Links 🔗 ]= 🎥 Stream Playlist: youtube.com/playlist?list=PLP29wDx6QmW7jg0LgRJYAmHLM6G_6NDw6💌 Updates to your inbox: tinyletter.com/lowleveljavascript🗣 Discord: discord.gg/FPWaVgk⭐️ Patreon: patreon.com/lowleveljavascript💻 Github Repo:
