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How to play OpcodeZ

1Each mission puts values in memory (200 upwards) and says what must end up where.
2Write 9618 assembly — LDD, LDI, LDX, ADD, CMP, JPN, AND, LSL… — and run it on every memory layout, including hidden ones.
3Clear it, then chase the medals: ◆ Size for few instructions, ⚡ Speed for few cycles. They often pull against each other.
4Readout missions and the Daily Readout ask the exam question: what is in ACC when the program ends?

What it trains

Addressing modes, compare-and-jump loops, bit masks and shifts, and tracing assembly code (9618 §4.2, §4.3, §20.1).

Answer fast, earn coins, buy power-ups — outplay the room.

One wrong answer and you're out. Be the last coder standing.

Guess today's Computer Science word in six tries.

Same code, two players: first to the right output wins.

Solve each task in the fewest 9618 assembly instructions.

Wire the logic gates that open each door.

Query the database, follow the clues, name the culprit.

Split clues, one locked server room — escape solo or with 3 friends.