Introduction

The Interactive Debug Facility (IDF) is a symbolic debugging tool for Assembler Language programs. You can also use it to debug programs written in compiled languages, at the object code level.

The Language Support Module (LSM) functions provide for debugging Assembler Language programs at the source level. The ASMLANGX utility reads the ADATA file, produced by the High Level Assembler when you assembled your program, and builds a file that IDF can use for source-level debugging.

You do not have to learn a new command language to use IDF. All IDF's basic functions can be performed by using the default PF keys.

IDF is window oriented. The screen can be filled with windows of various types, including:

Current Registers window
Disassembly window
Dump window
LSM Information window

Windows can be mixed and matched in any order or combination on the screen. You can open multiple:

Dump windows to view multiple areas of non-contiguous storage
LSM Information windows
Disassembly windows to view and modify your program at the object code level

These windows will show the source statements if they are available.

In general, the command that opens the window (for example, REGS for the Current Registers window) is used to close that window on the screen.