Trace Table Challenge

Question

Interactive mode: each line is marked the moment you tick it — get it wrong and you can try again, with a pop-up explaining why. Tap the ? on any line for a fully worked explanation instead.

Assembly code

Initial memory contents

The current contents of main memory and registers before execution begins.

Reference

Trace table

Convention: leave a cell blank where its value is unchanged from the line above — exactly as in the original mark scheme. Enter the instruction address first; the rest of the line then unlocks.

No lines recorded yet.

Trace Table Challenge

Assembly code

Initial memory contents

Reference

Trace table

Instruction set

ASCII code table (selected codes only)

Explanation