Titus Tsui

Exploring operating systems, AI, and general low level topics

See projects GitHub

~/solo-projects

Solo projects

thread exited!
switching from thread 1 to thread 480 at return
sys_anon_allocate called
sys_anon_allocate called
sys_anon_allocate called
sys_anon_allocate called
sys_anon_allocate called
sys_tcb_set called
sys_anon_allocate called
sys_anon_allocate called

HELLOWORLD HELLOWORLD HELLOWORLD

HELLO FROM TEST

unloaded elf

no more threads to schedule. switching to idle
created thread -889275714

willowOS

An SMP-aware Unix-like x86 64 operating system from first principles to study kernel architecture, multiprocessing, and scheduling mechanisms.
Implements key subsystems including preemptive round-robin scheduling, ELF execution in userspace, and standard C library integration for a semi-compliant POSIX userspace via mlibc.

C · Assembly · Systems

16-bit Microcontroller

A homebrewed 16-bit controller using logic gates, flip-flops, and multiplexers.
Features a basic instruction set with four opcodes enabling 8-bit arithmetic with hardware optimized addition through four registers, dual 16-bit busses, a 16-bit sum/product register, and a central accumulator.

CircuitVerse · Embedded

Python Platformer

A shooter platformer game built with the Python Arcade library.

Python · Game Dev

Arrow Language + Compiler

Compiler for the Arrow programming language targeting 6502 assembly for retro hardware compatibility.

Python · Compiler Design

Image Classification

Neural network implementation for recognizing facial emotions.

Python · PyTorch

~/ai-assisted

AI assisted

Apex Quant HFT

Autonomous quantitative high-frequency execution engine and trading workstation with Jito MEV protection.
Features sub-millisecond execution pipelines, Level 2 order book depth, algorithmic strategy fleet, and strict pre-trade risk controls.

TypeScript · Rust · React · Quant Finance

HP Visualize FX5 Linux Driver

Reverse-engineered legacy Windows 2000 drivers for the HP Visualize FX5 workstation graphics accelerator to recover undocumented hardware registers and timing tables.
Implemented an open-source Linux kernel framebuffer driver (hpfx_fb) and userspace 3D acceleration library (libhpfx3d) with hardware Z-buffering and FP14 rasterization.

C · Linux Kernel · Reverse Engineering · 3D Graphics

IN-14 Nixie Clock

Reverse-engineered the Geekstyles v2 PCB and fully rewrote its firmware for the STM8S003F3 microcontroller, driving 6 IN-14 Nixie tubes via an 8x SN74HC595 64-bit shift register chain.
Implemented software PWM for tube brightness, a hardware-failover RTC using TIM2, and a 10kHz RGB underlighting engine running inside the TIM4 interrupt vector.

C · STM8 · Embedded · Reverse Engineering

Particle

Real-time interactive particle simulation built with Raylib and uses quadtrees for optimization.

C++ · Raylib · Graphics

~/about

About me

Hi, I'm Titus Tsui. I'm currently studying CS. I love operating systems, HPC, and all things hardware.

I'm currently writing my own operating system named willowOS, but I've recently diverted into more mainstream AI and webapp development.

My passion is to use my problem solving skills to their fullest abilities and produce noticeable progress in whatever project or job I may be working at.

I also love playing the piano, hanging out with my friends, and consuming large amounts of mango sago :)

~/contact

Let's connect

Looking for opportunities in systems programming and related fields, but am also open to more traditional software developer roles.

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