Questions tagged [reverse-engineering]
The process of determining how a device was made. Usually for the purposes of replication.
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Do people fix software bugs in old arcade games?
Do people fix software bugs in old coin-op arcade games? Here is one list of arcade game bugs.
Presumably the ROM images that run on emulators like MAME allow reverse compilation. This would allow ...
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How can I reverse-engineer the game Wizardry (1981) for PC, based on UCSD Pascal?
I am looking at the files included with the 1981 game Wizardry. The particular version I have is from a 1998 re-release, but I do not know if the binary is still the original 1981 release.
My ...
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Reverse engineering an old 40-pin connector
I found a 40 pin connector on the side of one of my old electric typewriters. There is zero documentation of this plug online or in the owner's manual, and I want to figure out what exactly it can do. ...
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Can anyone help me identify what 6803/6303 development tools might have been used to build this program?
I've been doing some hobby work reverse-engineering vintage synthesizer ROMs from the early 80s, and I'm curious about what kind of development tools the original engineers may have used. Normally ...
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How do you jump to an absolute address in a SNES ROM, in IDA Pro?
I used to know more about the SNES memory mapping than I do now, apparently.
I'm using a combination of bsnes-plus (a debug oriented fork of bsnes) and IDA pro in an attempt to figure out something ...
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Trying To Understand DOS Game Assembly Instructions [closed]
I am trying to understand assembly language instructions, for a DOS Game. I have looked at the following Link :- https://atrevida.comprenica.com/atrtut07.html
reading about how VGA Graphics work in ...
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How can I make the Microsoft C compiler for DOS emit a loop with an intermediate jump to continue?
I am trying to recreate the exact C source code from some 16bit DOS 8086 assembly generated by the MS C 5.0 compiler. After making some progress, I've hit a wall with the following code (annotated in ...
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Is there a common name for this 'switch' like 6800 assembly routine?
I've been reverse-engineering a 6303/6800 binary from the early 1980s, which includes a subroutine for jumping to one entry in a table of relative offsets in memory, based upon whether the value of a ...
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How to make Microsoft C for MS-DOS emit an immediate-target far call into the data segment?
I am trying to recreate the C source code from some 16bit DOS 8086 assembly generated by the MS C 5.0 compiler. I've hit a wall with this far call instruction.
0000008D 9A2F0CB506 call 0x6b5:...
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Did Digital Research clean-room MS-DOS?
From https://en.wikipedia.org/wiki/DR-DOS
DR-DOS (written as DR DOS, without a hyphen, in versions up to and including 6.0) is a disk operating system for IBM PC compatibles. Upon its introduction in ...
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What information was "off limits" to IBM PC clone BIOS authors?
Back in the PC clone days the accepted legally defensible method of selling a non-IBM PC BIOS was using a "clean room" whereby an engineer who had never been exposed to proprietary IBM ...
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Reverse engineering an RS-422 protocol with access to only one device?
I have a console, but not the main computer it's designed to connect to.
My goal is to interface this with a (Linux) PC, and hopefully more than just the keyboard. I have never tried something like ...
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Dump process memory of Windows 3.1 control panel applet
I'm trying to work out how a Control Panel applet on Windows 3.1, which interacts with some host-specific hardware, works and as part of this I'd like to dump the contents of memory which the process ...
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Loading a Tandy CoCo or a Dragon 32 machine code program from cassette with multiple "name blocks"
For the Dragon 32 and the TRS-80 Color Computer I've found two documents describing how loading from cassette tape works:Dragon 32 doc, CoCo doc.
They both say that a standard program consists of a ...
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How are Amiga Kickstart Relocation Files (.RTB) created?
Examples of Amiga Kickstart files (ROMs) can be 256k (1.2/1.3) or 512k (3.0/3.1) binary files, located at $FC0000-$1000000 or $F80000-$1000000
Several programs are able to "soft-kick" Amigas, i.e. ...
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