ASTRA-256 — A BINARY VIRTUAL MACHINE PROGRAMMED IN ASSEMBLER Step into the era of early computing and feel like a real engineer from the past. ASTRA-256 isn’t just a computer — it’s a complete educational environment where you write real Assembler code for a virtual von Neumann architecture machine. LEARN BY PLAYING ASTRA-256 is: An interactive simulator for learning Assembler from scratch. A logic puzzle for those who love “real” programming. A nostalgic time machine for veterans of the LPG-30, Altair 8800, and PDP-11. This is the kind of machine pioneers of computing once used to solve real problems — under tight resource constraints, just like in the 1970s. WHAT CAN ASTRA-256 DO? 8-bit processor with accumulator and visible registers: IP, IN, OUT, SP, FLAGS. 256 bytes of memory — just like the original Altair 8800 released in 1975 with the Intel 8080. 75 instructions grouped by purpose: control flow, data movement, arithmetic, stack, I/O, and more. Lessons and documentation in five languages — printable, just like in the good old days. Start with simple programs and progress to complex algorithms: square roots, trigonometry, even mini-games. ASTRA-256 runs on a custom Assembler designed specifically for this environment. We intentionally offer an extended instruction set — similar to what you’ll find in modern microcontrollers and processors. It’s a hands-on way to gain foundational experience with low-level hardware logic — the kind that prepares you to work with any modern microcontroller. The principles haven’t changed.