RealXV6 vs TabletBasic

【 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.

TabletBasic is a retro BASIC learning environment. Inspired by Microsoft QuickBASIC, TabletBasic brings back the fast, friendly learning loop that made classic BASIC such a great way to start programming: type a few lines, run them immediately, see what happens, and try again. Designed for learning: - Write and run BASIC programs in a focused retro IDE. - Try quick commands in immediate mode. - Explore 80 built-in sample programs across 8 categories. - Follow beginner-friendly lessons. - Learn variables, loops, conditions, subroutines, arrays, data, random numbers, and expressions. - Draw simple graphics with SCREEN, LINE, CIRCLE, PSET, and COLOR. TabletBasic includes a native Swift interpreter and a clean interface inspired by classic DOS programming tools. It is not an emulator. It is a modern educational environment for experimenting with a practical, readable programming language. TabletBasic is an independent project and is not affiliated with, endorsed by, or sponsored by Microsoft.