RealXV6 vs MorseLab

【 Bring Lions' Commentary to Life 】 If you are studying operating systems, you know the legend: Lions' Commentary on UNIX 6th Edition. It is the "Red Book" that taught a generation of hackers how an OS kernel truly works. Now, you can bring that bible to life on your iOS device. 【 From Reading to Experiencing 】 The biggest challenge in understanding Unix v6 is that reading code is static, but an operating system is dynamic. We have solved this problem. We ported the classic Unix v6 to the Intel 8086 architecture (Real Mode) and built a powerful virtual machine around it. This isn't just an emulator—it is an interactive learning environment designed to help you verify the logic described in the book. 【 Key Features 】 The Ultimate Study Companion: Designed specifically to accompany your reading of the Lions' source code. Don't just imagine how the code runs—watch it happen. Source-Level Debugging: Say goodbye to raw assembly guesswork. Set breakpoints directly in the C source code to pause execution at critical moments. Precise Execution Control: Master the kernel's logic with full stepping capabilities. Step In: Dive into function calls to see how the kernel handles sub-routines. Step Over: Execute lines quickly to grasp the high-level flow. Step Out: Quickly return to the caller function to understand the call stack hierarchy. Deep Dive into the Kernel: Struggle to understand the complex flow of context switching or interrupts? Place a breakpoint on swtch() or trap() and trace the execution path line-by-line. Simplified 8086 Architecture: By running on 8086 Real Mode, the underlying hardware logic is easier to understand than the original PDP-11. Portable Lab: No complex setups, no QEMU configuration. Your pocket OS laboratory is ready whenever you are. 【 Why This App? 】 Don't just read the history of computing—trace it. Whether you are a CS student grappling with OS concepts or a veteran developer revisiting the classics, this app bridges the gap between theory and practice by letting you walk through the code live.

Learn Morse code by rhythm, sound, and real practice. MorseLab helps you build Morse skill step by step with guided drills, audio decoding, speed rounds, digit practice, and a free-play tapping board. Start with dots and dashes, then grow into letters, words, numbers, phrases, and listening practice. Train across focused modes: Guided Training teaches Morse through clear word and sentence drills. Decode mode shows Morse patterns so you can type the English answer. Audio Decode trains your ear with Morse tones, letters, words, numbers, and short sentences. Numbers mode focuses on digit patterns from 0 to 9. Lightning mode pushes your speed with timed rounds and tighter rhythm. Playground lets you freely tap, hold, clear, delete, and experiment. Random Words gives you fresh practice prompts when you want variety. Customize timing, audio, and haptic feedback to match your pace. Track your progress with statistics for letters, signals, words, speed, recent sessions, and best times. Whether you are learning Morse code for the first time, practicing CW for ham radio, improving listening recall, or sharpening your tapping rhythm, Morse Code Lab gives you a clean, focused place to train. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: