Running IDF on a sample program

Open the Current Registers window by pressing PF2.
The Current Registers window shows the PSW, 16 general purpose registers and 4 floating point registers.
Open the Disassembly window by pressing PF9.
The Disassembly window shows the sample program in object and disassembled forms.
Execute the first instruction by pressing PF1. This will cause IDF to automatically load the language extract file for source-level debugging.
Open windows to display source variables:
```
  open var vpacked
  open var vhalf
  open var vfull
  open var vchar
```
Tip: Use PF12 to retrieve the previous command and then overtype the last few characters.
Press PF1 until the end of the program, observing the changing values in the Current Registers window, and values being set in storage as displayed in the LSM Variable Information windows.
Press PF3 twice to exit IDF.