I will get back to your question regarding my progress in another post. I tried searching on how to use NASM for 16-bit code and unfortunately didnt understand what its saying. I know that 16-bit assembly code just differs from normal x86 assembly code in that it uses bits 16 and also 16-bit registers (ax, bx,cx. Online documentation can be rather lengthy and abstract. Weve been asked to write 16-bit assembly code and assemble it to run in DOSBox. Being able to write a short assembly language program and immediately executing it is a very useful way to see what a instruction does. Gentoo Linux, 0.74, portage OS/2, 0.74, exe (OS2) Solaris 10 - sparc, 0.73, pkg BeOS, 0.63, binary (x86) Old dosbox versions, 0.50-0.74-2, source + binary(. Does the DOSBox debugger allow you to feed it a few instructions and execute them? Like Debug? The reason I am messing with Debug is because I realized my knowledge of the specifics on some instructions was lacking. I am only interested in realmode 8086 instructions as the games I have been trying to analyze don't need anything more. I got Debug to work by installing a full MS-DOS 6.22 installation onto a harddisk image. (the debugger is rarely changed and there is a dosbox-current build available)ītw: did you get any further with your Alley Cat analyse It must be word value.There is no need for that - use the dosbox internal debugger (way more easier): builds are available here: DOSBox debuggerĪnd "no" you don't need to build from source yourself if even the antiqued debug.exe seems to fit your needs □ - beware the internal dosbox debugger is also started with "debug " on I have now learned that I do not have the Debug.exe tool on my disk to do some things I need. Run debug and enter something along the lines of the following transcript: c:src> debug -a 100 1373:0100 mov ah,9 1373:0102 mov dx,108 1373:0105 int 21 1373:01:0108 db 'Hello world' 1373:0115 -n c:hi. I have a disk that I use to reformat hard drives and other Dos task. EDIT: If the OP is using MS-DOS or a compatible OS, he needs to understand the DOS API: My bad. I think DEBUG.EXE still ships with windows (at least it does with XP). Faille to do that can have strange results. (Offensive, Roadhog, GTA installer, Kingdom O Magic soundcard detection, Pirate booter, Armored Fist installer) - Add the S3-specific 640x480 256 color mode. Get immediate attention for urgent notifications and lift employee engagement all through one multi-channel platform. Changes: - Several small game specific fixes/hacks/support. Cut through the noise of overloaded inboxes and collaboration tools. One a byte value and the other a pointer. Dynamic, visual tools get 100 message readership over desktop, digital display, and mobile, whether staff are working from home or the workplace. Here is preference that explains why IN 21h is used in assembly: In general, that call should have two parameters in registers. Also, your ought to document with system calls your are using with INT 21H so that others can help you. Use you- can use 16 bit code only on 32 bit versions of Windows. Recommended way to add games in order to keep a clean setup and ease debug process (whenever needed). And if you have a 64bit Windows system you also must use either 32 code. consider using the auditing system to limit what the DOSBox-X executable is. This could result in some programs and/or OSes to not work as expected when used in DOSBox. XCode (on Mac OS X, from the Terminal) to target Mac OS X. This may be because DOSBox may not be 100 compatible emulating a real PC/Hardware(and DOS). It will give you a nice debug window where you can stem trough the assembler code. It would seem that DEBUG.EXE versions available for MS-DOS do not always function properly when run in DOSBox. If you are using Linux, you must use only 32 bit code. Namely unexpected hangs or unusual behaviour. Please clarify what you want to do and why you sue specific codes. You code does not look like an input routine. You description sounds like an input procedure where the user must enter a specific key from the keyboard. Intended for experienced programmers, DOS Debug provides an utility that can replace the MS DEBUG command. I put that here so others know what we are talking about.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |