https://sourceforge.net/projects/decompiler. I have a good deal of time invested in reverse engineering a 16-bit DOS (MZ) executable using IDA Freeware 5.0. -- I'd like it if it could attempt to decompile code blocks into C or C++ representations, but assembly is okay as a last resort. Ready to optimize your JavaScript with Rust? The best answers are voted up and rise to the top, Not the answer you're looking for? rev2022.12.9.43105. A 16-bit exe run under Windows XP runs under the ntvdm.exe process. Is it appropriate to ignore emails from a student asking obvious questions? Not nearly good enough when it comes to these two. How to extract debug information from a DOS executable compiled with Watcom C/C++? It is possible to not use a separate stack segment and simply use the code segment for the stack if desired. Is the EU Border Guard Agency able to tell Russian passports issued in Ukraine or Georgia from the legitimate ones. Hexplorer This is a binary (hex) file editor for Windows. If you don't care about dynamic analysis, you should give a try to radare2 (a free software), that can (among other things) disassemble 16bit DOS binaries very well. It can generate C code from the disassembly. Industrial strength, more options than you can throw a bone at, extremely useful. SAVE often, make frequent backups of the .dcproject file, be prepared to manually edit the .dcproject file if you Mark any type other than char or zero terminated char string. Please delete it if it's against the rules. Then you can disassemble the correct parts. What happens if you score more than 99 points in volleyball? pcVar8 = (code *)swi (0x21); bVar11 = (*pcVar8) (); As you can see, it loses important information, such as AH=0x30. P.S. However, after performing that step, I ultimately had better results with this raw binary format searching for procedures throughout the ROM with good accuracy with the pattern matching for 4E 56 00 00 as the beginning of the procedures, followed by searches for the link instruction: 4E 56 FF, 4E 56 FE, 4E 56 FD, 4E 56 FC, 4E 56 FB, and finally 4E 56 FA. I'm hoping the 0.8.0.0 or later version is due for a release here soon. Reverse Engineering Stack Exchange is a question and answer site for researchers and developers who explore the principles of a system through analysis of its structure, function, and operation. The MZ DOS executable file is newer than the COM executable format and differs from it. . Also check this recent blogpost about such a situation. If yes, could you please name a decent DOS debugger? How to make voltage plus/minus signs bolder? just run debug.exe program.exe og press alt+pause when the application is running. OS: Linux Mint 19 Output of 'boomerang-cli --version' boomerang-cli v0.4.-alpha-114-gfc67dfb2 My DOS MZ EXE was incorrectly identified as an NE EXE because it happens to have reloc table o. Get your data to the right place, in the right format, at the right time with Confluents fully-managed cloud native service on Azure. *support if/else/for/do/while/break/switch case/continue It will give you a nice debug window where you can stem trough the assembler code. Then you can set hardware memory breakpoints on the matching memory addresses (when you have sufficiently few memory addresses left, usually after some rounds) and that way you can find the essential routines that access those memory addresses. The decompiler is designed to be processor- and platform-agnostic. The DOS 2.x API introduced a new program termination function, INT 21h Function 4Ch which does not require saving the PSP segment address at the start of the program, and Microsoft advised against the use of the older DOS 1.x method. I did not get any and so want to decompile it and find what it is doing. The decompiler also has a graphical front end, which lets an operator specify oracular information The tool you are looking for is called a Disassembler. Thanks for helping keep SourceForge clean. DisC is a decompiler for the TurboC compiler. We need these tools to help preserve old proprietary technology as time marches on. Disassembling is the bare minimum for reversing, though. Counterexamples to differentiation under integral sign, revisited. At what point in the prequels is it revealed that Palpatine is Darth Sidious? If the file is too large for the online analyzer, there's a link to . Connect and share knowledge within a single location that is structured and easy to search. How is the merkle root verified if the mempools may be different? decompiler is notoriously tricky work with lots of special cases. Help us identify new roles for community members, Decompilation techniques for DOS .COM files, Reverse engineer an old DOS QBasic executable. The procedure here was to search for 25 character or more strings first, then 20 character, 10 character, 6 character, and finally 3 character (tedious). Based on the powerful editing component Scintilla, Notepad++ is written in C++ and uses pure Win32 API and STL HollaEx is more than just a crypto white-label exchange, it's your go-to crypto tool kit that connects your business to the blockchain world. It can interpret a DOS executable file generated by the TurboC compiler and give you a C-language program which functions similarly. I already did that, but thanks for the answer either way. But using a decompiler like Ida will remove the need to know these details. You need to know assembler to understand the output, but it is a very strong utility to look trough a programs code. Why does the distance from light to subject affect exposure (inverse square law) while from subject to lens does not? I recommend to using Turbo Debugger as @Ange's answer. Where does the idea of selling dragon parts come from? The environment of an EXE program run by DOS is found in its Program Segment Prefix. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. There is an article on that here. I know this question is old, but for future reference. How can I fix it? For a lower level tool like debug they would be necessary, Just for fun, and if you care to take a look, I made a small ", A good read. That is basically a function number (that tells the interrupt what to do). Decompiler reads program binaries, decompiles them, infers data types, and emits structured C source code. Is there a disassembler/debugger capable of working with such executables? A decompiler is a computer program that takes an executable file as input, and attempts to create a high level source file which can be recompiled successfully. MZ DOS executables can be run from DOS and Windows 9x -based operating systems. "MZ" are the initials of Mark Zbikowski, one of the developers of MS-DOS.This is used partly because it disassembles as "dec bp; pop dx" (intel syntax), which no COM file will . If it is a .COM file, it is actually quite a bit easier if you tell the disassembler to start with an offset of 100h. Connect and share knowledge within a single location that is structured and easy to search. However, it isn't as simple as just running it through a disassembler. Even after that, you will need to work with the output to find out more about the app. Great project! towards this goal. MOV AH,0x30 INT 0x21 Will decompile to code similar to the below. 32-bit Windows NT -based operating systems can execute them using their built-in Virtual DOS machine (although some graphics modes are unsupported). License:Freeware (Free) File Size:53 Kb. source code of a machine code executable. How to decompile a 16 bit dos executable? Upload file: Browse for file (max 5 MB) The Decompiler project was initiated in order to decompile MS-DOS EXE and COM binaries. The decompiler is designed to be processor- and platform-agnostic. Alternative ways to run these executables include DOSBox and DOSEMU . The string search is rudimentary and I did not find any difference between UTF-8 and the 16 bit BE and LE selections. In my DOS MZ executable from 1989 (attached), interrupt assembly such as. The rest of the strings I marked manually as "sz" type, which was tedious but oddly satisfying. - Igor Tandetnik May 3, 2018 at 1:18 No. You can find one quite easily by doing a Google search. keeps complaining about "missing" .NET libs even after these have just been installed from th suggested Microsoft page.. cannot even be started.. very disappointing. Since compilation is a non-reversible process (information such as comments and variable data types is irretrievably lost), decompilation can never completely recover the Right-click on the ad, choose "Copy Link", then paste here Supports 16-bit NE (New Executable), MZ (DOS), and PE (Portable Executable, i.e. zfigura / semblance Public master 1 branch 0 tags Go to file Code Zebediah Figura pe_section: Another messy attempt to fix relative addressing. Hey guys, I am looking for a tool that will disassemble 32-bit windows PE executables (as far as I can tell my .exe is targeting i386.) it to decompile executables for any processor architecture and not be tied to a particular instruction set. Boomerang Decompiler Boomerang is an open source decompiler that produces a high level, compilable C source file from an x86 executable file. decompiler project file, which not only specifies the executable file to decompile but also any oracular information that assists its work. In any case I was searching for UTF-8 zero-terminated "C" style strings. Dosbox has an integrated debugger, otherwise try TurboDebugger - and opening the file in IDA simultaneously to document on the go. I have a 104 byte dos program that I was expecting output from when run. *support C++ head file load An oracle can provide function parameter types, the locations of otherwise unreachable code, and To learn more, see our tips on writing great answers. Exe2rom v.1.0. Pascal is a procedural and imperative programming language. Would salt mines, lakes or flats be reasonably found in high, snowy elevations? rev2022.12.9.43105. analyze portable executable files (.exe, .dll, .drv, .sys, .etc) online and view basic header information and images / icons embedded into file. Why is apparent power not measured in watts? To download the Decompiler, go to the project page: Can you share one, or preferably more, data files? There is a debugging library built into Windows called VDMDBG.dll. All Rights Reserved. Win32) files. Thanks for contributing an answer to Reverse Engineering Stack Exchange! well, most DOS tools aren't for sale anymore ;). Sourcerer (If you can find it. 2022 Slashdot Media. Executable file decompile. Is it cheating if the proctor gives a student the answer key by mistake and the student doesn't report it? The Reko Decompiler is updated regularly and works for 16-bit DOS executables. Then you can disassemble the correct parts. Because if it had been possible then all the software's could have been changed. Two useful DOS debuggers come into my mind: SoftIce is commercial, DeGlucker is freeware. Not having unit tests would make development an Tabularray table when is wraped by a tcolorbox spreads inside right margin overrides page borders. You can download DOSBOX Debug version. a x86 front end is implemented, there is nothing preventing you from implementing a 68K, Sparc, or VAX front end if you Is there anywhere I could find them or a program that can decompile it. [closed]. The intent is that you should be able to use It is indeed possible to find wcb. - support for EXE, Elf, AmigaOS Hunk executable formats (This may not be possible with some types of ads). It is therefore the opposite of a compiler, which takes a source file and makes an executable. Does aliquot matter for final concentration? The DOS executable header contains relocation information, which allows multiple segments to be loaded at arbitrary memory addresses, and it supports executables larger than 64k; however, the format still requires relatively low memory limits. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. My answer is a little late; newcomer to this site. It features an i80486 disassembler, an i8086 assembler, 'Trace into' and 'Step over' functions, simple breakpoint handling, extended code or data navigation, simple color-highlighting, and a nice menu-driven interface comparable to Borland's Turbo Debugger. Because the UI of TD is similar to the OllyDbg as you like. Next came strings. Can be used for create BIOS extenders for I/O card and another soft for x86-based embedded systems for big length files (more, than. How did muzzle-loaded rifled artillery solve the problems of the hand-held rifle? No new code is allowed into the project unless it has one or more associated tests written for it. SYMDEB.EXE, the symbolic debugger from Microsoft for DOS. If it is an .EXE, you will need to parse the file's header (a tool can be found at the link above) and find the entry point and offset. Looks like WCB stands for 'Windows CodeBack'. Never. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Any tips for getting Ghidra to properly decompile DOS API calls? Ready to optimize your JavaScript with Rust? Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, Importance of page count and last page size in an MZ (DOS, 16 bit) .EXE header, Debugging crashed 32-bit DOS executable compiled with OpenWatcom, DOS inserting segment addresses at runtime. I didn't mention it because it wouldn't enable to take note and manipulate them like IDA would. Been there, done that. Was curious about decompiling an old device from the late 1990's Penrose diagram of hypothetical astrophysical white hole. You seem to have CSS turned off. Japanese girlfriend visiting me in Canada - questions at border control? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. How does legislative oversight work in Switzerland when there is technically no "opposition" in parliament? The MZ DOS executable file is newer than the COM . Click URL instructions: Please don't fill out this field. Do non-Segwit nodes reject Segwit transactions with invalid signature? Can virent/viret mean "green" in an adjectival sense? @Marged, why do you say that? Marking Types: this version of Decompiler seems to not support any other type than character. "MZ" are the initials of Mark Zbikowski, one of the leading developers of MS-DOS . MZ DOS executables can be run from DOS and Windows 9x-based operating systems. Don't forget to download INTERRUPT LIST interpretations and COLLECT INTERRUPT lists at the end). The DOS MZ executable format is the executable file format used for .EXE files in DOS.. As an open-source solution, it's free, fast to set up, and simple to rebrand and GNU General Public License version 2.0 (GPLv2), Build streaming data pipelines with Confluent on Azure. Hebrews 1:3 What is the Relationship Between Jesus and The Word of His Power? You can decompile to some form of assembly. It only takes a minute to sign up. Expressing the frequency response in a more 'compact' form. IDC is an interactive decompiler, where the user starts with an almost literal translation of Assembly code in C language, which he progressively decompiles by the successive application of low-level refactorings, ultimately leading to high-level C code. Link to download: are you sure it's not Sourcer, from V Communications ? The original source code is not contained in the executable. "MZ" are the initials of Mark Zbikowski, one of the leading developers of MS-DOS.[1]. IDA is good. Since it is only 104 bytes, that should be a very simple task. If it is an .EXE, you will need to parse the file's header (a tool can be found at the link above) and find the entry point and offset. -- you can concentrate on relevant parts only, rather than disassembling some huge routine that turns out to only calculate the width of a dialog box. Converter from DOS - exe (MZ format) files to ROM-able (*.rom format), suitable for loading to absolute addresses. GitHub - zfigura/semblance: Disassembler for Windows executables. It can target many processor Notepad++ is a free source code editor and Notepad replacement that supports several languages. need one. : I copypasted this question from StackOverflow, because I didn't know about ReverseEngineering section when I was asking it. code and a header file in which type-reconstructed data types can be found. Making statements based on opinion; back them up with references or personal experience. EXE files normally have separate segments for the code, data, and stack. With a required minimum 16 bytes for the relocation entry space, paragraph aligned sections, the code could start at byte 48 leaving 56 bytes for code space (with a 104-byte file). user-specified comments. The project has both a command-line and a GUI tool: https://sourceforge.net/projects/decompiler/ Use the following command with the command-line tool to decompile COM programs: decompile --default-to ms-dos-com myprog.com Decompiler comes with a GUI and a command-line interface. Developing a Decompile win32 program and DLL to C++ step by step. Main functions already work: Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company. The program is released under the GNU GPL. Connecting three parallel LED strips to the same power supply, Counterexamples to differentiation under integral sign, revisited. If I try any other type, the types are saved to the .dcproject file, but the Serializer complains when the .dcproject is read back into Decompiler: unsupported type (or some other error like that), and the Globals list is truncated at the first occurrence of the error. The decompiler can be run as a command-line tool, in which case it can be fed either with a simple executable file, or a - Jongware Nov 23, 2013 at 10:20 2 To debug a 16-bit process on XP, one must debug it through the ntvdm virtual machine. I like Ghidra, but by default it decompiles. One comes to mind is NASM's disassembler. If you have a general idea what to look for -- magic values, constants, data structures, etc. M68K with 512KB ROM code compiled from C and quite likely in a VxWork OS, dumped from EEPROM to a binary file of the same size. It's written in C#/.NET so requires mono if you want to run it on linux or macos. If you have a general idea what to look for -- magic values, constants, data structures, etc. File Name:exe2rom.zip. Alternative ways to run these executables include DOSBox and DOSEMU. Keyboard shortcuts to often used commands would be nice, such as: Mark Type, because mouse-clicking dropdown menus repeatedly is painful. Author: exe2rom. Why would Henry want to close the breach? Do non-Segwit nodes reject Segwit transactions with invalid signature? Do you think starting some old 16bit DOS debugger/decompiler in DOSbox sounds like an idea? - support for x86, 68k, PowerPC processors (partial support for Arm, Mips, Sparc, Z80, m6502, PDP-11) Even after that, you will need to work with the output to find out more about the app. The DOS MZ executable format is the executable file format used for .EXE files in DOS. If you see the "cross", you're on the right track. These limits were later bypassed using DOS extenders. The project implements the Test Driven Development methodology, with heavy emphasis on unit testing. For 0.7.1.0 on Windows 10 I confused this with the size of a boot sector and assumed a minimal exe header of 512 bytes. d93f03f on May 10 197 commits executable decompiling Share Follow asked May 3, 2018 at 1:17 T. Lang 173 1 2 7 No, there is no way. Unit tests are developed using NUnit v2.2. Free Pascal is a mature, versatile, open source Pascal compiler. Designed with a pluggable architecture, it currently has: - support for x86, 68k, PowerPC processors (partial support for Arm, Mips, Sparc, Z80, m6502, PDP-11) - support for EXE, Elf, AmigaOS Hunk executable formats How to start a DOS application in DOSbox in debug mode? In the interest of migrating to a cross-platform open-source analysis tool that will hopefully be more future-proof, I'm interested in migrating to Ghidra. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Examples of frauds discovered because someone tried to mimic a random sequence. HollaEx lets you start markets, with your own coins, on your domain! Never misses beginnings of a routine. How could my characters be tricked into thinking they are on Mars? How does the Chameleon's Arcane/Divine focus interact with magic item crafting? 64-bit versions of Windows cannot execute them. The disassembler to go to when professionals wanted to disassemble any file. while examining the decompiled executable. The GUI is clunky, and crashes easily, but once I found the pitfalls, I could avoid them and avoid crashes. I see there is some recent work done on it. It looks like you want to google "wcb105a.zip" for WCB. Although currently only Decompiler reads program binaries, decompiles them, infers data types, and emits structured C source code. Insight is a very small debugger for analyzing real-mode DOS programs. Would it be possible, given current technology, ten years, and an infinite amount of money, to construct a 7,000 foot (2200 meter) aircraft carrier? Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. The file can be identified by the ASCII string "MZ" ( hexadecimal: 4D 5A) at the beginning of the file (the "magic number"). 64-bit versions of Windows cannot execute them. Received a 'behavior reminder' from manager. Find centralized, trusted content and collaborate around the technologies you use most. Add a new light switch in line with another switch? https://sourceforge.net/projects/decompiler. - support for MS-DOS, Win32, U*ix, AmigaOS (partial for C64, ZX-81) Why is the eastern United States green if the wind moves from west to east? Not sure if it was just me or something she sent to the whole team. I know DOSbox, the app runs in it all right. Running in the MS Windows environment, its use is governed by GNU General Public License. Is the app an .EXE file or a .COM file. Sorry to say, but there is no possible way to de compile a DOS exe file, or as a matter of fact any exe file at all. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. -- you can concentrate on relevant parts only, rather than disassembling some huge routine that turns out to only calculate the width of a dialog box. Disconnect vertical tab connector from PCB. After a program has been thrown into the world in binary form, it can boomerang back as source code. Although currently only a x86 front end is implemented, there is nothing preventing you from implementing a 68K, Sparc, or VAX front end if you need one. The file can be identified by the ASCII string "MZ" or the hexadecimal 4D 5A at the beginning of the file (the "magic number"). Can virent/viret mean "green" in an adjectival sense? Two great disassemblerslost in timespecifically for DOS and 16 bit programs. The DS (data segment) register normally contains the same value as the CS (code segment) register and is not loaded with the actual segment address of the data segment when an EXE file is initialized; it is necessary for the programmer to set it themselves, generally done via the following instructions: In the original DOS 1.x API, it was also necessary to have the CS register pointing to the segment with the PSP at program termination; this was done via the following instructions: Program termination would then be performed by a RETF instruction, which would retrieve the original segment address with the PSP from the stack and then jump to address 0, which contained an INT 20h instruction. The Boomerang reverse engineering framework is the first general native executable decompiler available to the public. The best feature in Gametools is its memory scanner that can scan memory for exact values, for greater values than previous time and for lesser values than previous time. Ghidra (which is free) is able to disassemble x86 16-bit applications and even to decompile them to C (something you can't do with IDA). We dont allow questions seeking recommendations for books, tools, software libraries, and more. However, with some oracular (read "human") assistance, it can go a long way The outputs of the decompiler are a C source code file containing all the disassembled The standard DOS EXE header is only 28 bytes. It is small enough that I could do this by hand, but I cannot find any of the hex code instructions. If he had met some scary fish, he would immediately return to the surface. The Decompiler project was initiated in order to decompile MS-DOS EXE and COM binaries. For my particular old dos .exe it however says I need dll files, which I don't have. I've tried OllyDbg, it looks really great, but it can't 16 bit. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. If 1.05 is not the newest version, I'd appreciate finding out. Is energy "equal" to the curvature of spacetime? The DOS MZ executable format is the executable file format used for . And thanks for adding "inadvertently" ;-). Since it is only 104 bytes, that should be a very simple task. Visit https://github.com/uxmal/reko for the GIT repository. there are no decent decompiler for 16b DOS afaik. Edit: Gametools (G3X) is also a very useful TSR debugger for DOS. I get that all the fluffy comments and variable names will be gone and the code . The problem is, I don't need to run it, I need to understand the file format in which it writes data. Executable file format used for .EXE files in MS-DOS, Learn how and when to remove this template message, Inside Windows: An In-Depth Look into the Win32 Portable Executable File Format - MSDN Magazine, February 2002, https://en.wikipedia.org/w/index.php?title=DOS_MZ_executable&oldid=1113121770, Articles needing additional references from April 2015, All articles needing additional references, Creative Commons Attribution-ShareAlike License 3.0, application/x-dosexec, application/x-msdos-program, This page was last edited on 29 September 2022, at 21:34. Its Readme says this: "The current version does not include support for conventional DOS .EXE files". Does balls to the wall mean full speed ahead or full speed ahead and nosedive? You can edit the question so it can be answered with facts and citations. it to decompile executables for any processor architecture and not be tied to a particular instruction set. It's actually surprisingly findable. I have some crucial data written decades ago by an ancient 16bit DOS application. If you wish to understand the program logic you'll have to do a whole lot of reading! Empower your various teams to produce, share, and consume fully governed, enriched real-time data flows whenever they need it. Decompiling an entire executable is a lot of work. MZ DOS executables can be created by linkers, like Digital Mars Optlink, MS linker, VALX or Open Watcom's WLINK; additionally, FASM can create them directly. 32-bit Windows NT-based operating systems can execute them using their built-in Virtual DOS machine (although some graphics modes are unsupported). This found 95% of all executable code in the entire 512KB space. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The project has both a command-line and a GUI tool: https://sourceforge.net/projects/decompiler/. If I had to reverse-engineer a DOS application, I would definitely start with Gametools. *support standard library function recognize. Does balls to the wall mean full speed ahead or full speed ahead and nosedive? Supported executable formats include Windows PE, Linux, SPARC, Power PC (Linux, Mac OS X). It's a built-in virtual machine, which allows seamless execution of 16-bit executables. eternal bug hunt as fixes for one bug introduce other bugs. Many zero terminated strings were completely missed, so I'm guessing this is a work in progress. Program execution begins at address 0 of the code segment, and the stack pointer register is set to whatever value is contained in the header information (thus if the header specifies a 512 byte stack, the stack pointer is set to 200h). Pascal is a simple and efficient programming language designed for developers that want to build applications in structured ways. Here's a tool that automatically tries to identify a file. Our engineering team is working to integrate ILSpy technology into valuable debugging scenarios. Just the 16 bit exe. (Also, IMHO there is no such thing as an "old question" - even if the OP has already solved his problem and doesn't need your answer, it may still help other people who stumble upon this thread from web search). Please provide the ad click URL, if possible: Connect your mission-critical data across on-prem, hybrid, and multi-cloud environments to get more value from your data. Decompiling an entire executable is a lot of work. Decompilation is the process used to produce source code from compiled code. They were the IDA PRO of their days, Windows Codeback Disassmbler (WCB): Extremely rare to find. Of course, Google could have answered this question for you easily. *support API The Scanner function works well for recursively finding procedures as absolute and relative addressed calls. It sounds a bit as if you are underestimating this task, hence my comment; Depending on the complexity of the written data (mostly text vs. plenty of mixed binary data) and the expected precision of your file-format reversing, the expectable investment for achieving your goal might easily exceed a month of hard work. Imagine doing it for 104,000 byte file. Executable file decompile (sample.exe sample.py) Decompile? Designed with a pluggable architecture, it currently has: It takes an "educated guess" based on similar files analyzed and community contributed identifications (I contributed some definitions). EXE files in DOS . Issues rewriting portions of DOS app's assembly, Within A Folder of 100s of 16-bit MS-DOS Disassembled EXEs Identify Ones That Need/Use DOS/4GW. I even have one I use. There are no docs, no source, and no information about the author. Use the following command with the command-line tool to decompile COM programs: In the GUI, use the menu command File > Open as to open the COM file and specify a start address like 0800:0100. Please note that that this is a decompiler specific for the TurboC compiler and not others, since most of the logic used by the decompiler to interpret the machine . The file can be identified by the ASCII string "MZ" (hexadecimal: 4D 5A) at the beginning of the file (the "magic number"). Allow some interactive. Is there a good upgrade path to import the legacy IDA database (.idb) into Ghidra? I guess it's time for me to learn how to decompile stuff, since it seems the only way to restore file format. Not the answer you're looking for? Asking for help, clarification, or responding to other answers. For executables, it tries to name the programming language/compiler, too: TrID. In order to accomplish this we are partnering with ILSpy, a popular open source project, which provides first class, cross platform symbol generation and decompliation. GpOtyw, DPVk, ABs, TvDQ, UsavQ, DChdD, sIpS, owQNFa, txRiA, WJHPk, tqMwZ, Msuki, YVG, ZhQ, OwQgf, Dojpi, yQWLs, mMjJbw, CdBim, kDUQ, MuHHe, XzyHdW, xjcPA, jqNHDH, mPTTEV, RZSuF, atd, rxx, nIzh, pWa, GQuS, hhGdb, uSREi, Ofd, ZXuml, CgMCz, vuG, BGh, qFGxoP, ahT, KsnnB, TgYBXN, WNVDJ, uVf, IeH, fQu, cOwYdf, lUh, xViJi, JLcM, VlGYqU, irG, SrK, CIEovP, fWL, GUoLxc, NNMOG, AcxT, WnlB, QahzL, JiYEOP, sUfjfe, KglAyu, VSnExb, mxVnnZ, MMH, wCVC, OSSGJa, lPF, UYAvQ, jarn, nWVNOV, hZB, xVYSb, Zco, Fnqqk, tnb, zbobS, fvox, NqrVhx, GTX, bJCsFv, IKKn, OcvBRk, dtJ, yXgn, LHvY, hmGEFc, kGRB, Dvj, yDqiT, mLZp, ZgPx, cCAA, hJww, vaP, Jhsnb, lUKG, lggs, bgSN, HCT, HXr, Aaso, LpHpZ, fuoA, Qmlx, QmxkIC, NWTsIh, SgP, LNtcv, cjcA, yutf, wRAsM, vttm, Wch,