Press 'Run' to start ROM image emulation.
To execute a function step by step :
- Place a break point @ address 1771o ; do not enable it,
- Enter a number,
- Enable the break point,
- Press the function key ( f sin for example) : then the emulator is halted @ address 1771o,
- Activate Trace and Regs,
- Execute the function Step by Step with the 'step' key,
- The 'trace' window shows the registers of the calculator.