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-
- If you have ideas, questions, etc., - please call me!
-
- ----------------------------------------------------------------------------
-
- Here is some technical information about IDA 2.09
-
- I hope it is useful.
-
- Contents:
-
- 1. Macros
- 2. Default IDC files
- 3. How IDA searches for files
- 4. Memory
- 5. Some history
- 6. More history
- 7. Acknowledgements
-
-
- 0. Basics
- ---------
-
- IDA is an interactive disassembler for Intel 80x86, Intel 8080/8085,
- Z80 and i860 processors. It can handle various input file formats
- including com, exe, bin, MS Windows executable, OS/2 executable and
- Intel Hex format files. For 8080..Z80..HD64180 processors it can produce
- output text for various assemblers. IDA has a user-friendly menu-driven
- interface, built-in C-like language, ability to patch the input file,
- and virtually no limitations on the size and complexity of input file.
-
- 1. Macros
- ---------
-
- You can use keystroke macros in IDA.
- To start recording a macro, press Alt--
- Press a key to define (for example, Ctrl-D)
- Enter macro body (any keys)
- To end recording - Alt-=.
- To play macro - the defined key (in our example - Ctrl-D)
-
- 2. Default IDC files
- --------------------
-
- When IDA starts, it searches for ida.idc file. If IDA founds it,
- IDA executes this file. If not, IDA proceeds silently. It is expected
- that you will place your setup commands into this file. I hope that in
- the future ida.cfg file will disappear. If you try to disassemble some
- MS DOS driver (file extension .sys or .drv), IDA executes 'driver.idc'
- file.
-
- 3. How IDA searches for files
- -----------------------------
-
- First, IDA looks into the directory, where IDA.EXE was started
- from. After it looks into PATHed directories.
-
- 4. Memory
- ---------
-
- IDA requires about 450k memory to start up. It can use extended and
- expanded memory for its code overlays. The disassembled data is kept
- partially in the conventional memory, partially on the disk. Normally if
- IDA starts up, it won't ask for more conventional memory (unless you
- open more windows).
-
- IDA regularly checks the current disk drive for the free space. If
- free disk space becomes low, it will ask you to exit and give more
- place. IDA will repeat it until you exit. This is made because
- unsiffucient disk space is very dangerous.
-
- Of course, you need a good disk cache to improve performance of IDA.
- In this case data will be cached too.
-
- 5. Some history
- ---------------
-
- First idea about IDA was born in the fall of 1990. It took half an
- year to screw up enough courage and to start implementing it. In the
- beginning of 1991, in January, first code line was written. In April
- 1991 the first program was fully disassembled with IDA. IDA grew up and
- new ideas appeared. I wanted to create a built-in C-style language to
- control analysis of the program, to add more processors, to disassemble
- object files, to handle UNIX COFF files, to add more intelligence to IDA
- e t c...
-
- Alas, all of this was not implemented. In July 1991 I stopped
- working at IDA almost completely, working at IDA only for fun. It was
- time to learn more about other computers, networks and other nice
- things. Today I would implement something based on client-server
- architecture with network support (I have a crazy idea about X-windows
- implementation) working under various operating systems - but I won't.
- Enough for the moment. I really think that disassemblers and all the
- staff like this are becoming obsolete. People work with GUIs, write in
- C++ (IDA is written in C++ too, about 40000 lines); they adore
- VisualBasic and they debug in source codes. Today's programmer even
- doesn't know assembler language - and doesn't need to know it.
-
- But...
-
- I hope that this product will be a help for you. If so, I'm glad.
- Hope, there are some people who need a tool like this. And if there is a
- need to add a new processor type to IDA (the same was with Intel 8085),
- I can do it fast enough.
-
- 6. More history
- ---------------
-
- 08.11.93 I never thought that I would work at IDA again. But you see,
- here is a new version. And now I understand that new versions
- of IDA will appear...
- 17.02.84 I'm working on IDA to eat MS Windows executable files now. Hope
- that it will come soon!
- 25.02.94 Now IDA can disassemle New Executable format files.
- 20.09.94 OS/2 files are supported.
-
- 7. Acknowledgements
- -------------------
-
- IDA would never be created without ideas and great support of these
- nice folks (sorry, it is not possible to mention all the people involved
- in IDA here):
-
- Serge Samborskij
- Pol Rousnak
- Nicolaj Logvinov
-
- Thanks to you all !
-