: A widely recommended compatible replacement for the standard DOS
To change a register value, e.g., set BX to 1234 :
If you don’t have DOSBox yet, follow these steps: Download Debug Exe For Dosbox Windows
MS-DOS is considered “abandonware” by many retro communities. A safe and widely used source is the project or abandonware archives like VetusWare . For DEBUG specifically, you can extract it from a standard MS-DOS 6.22 disk image.
-A 100 (Assemble starting at address 100) mov ah, 09 (DOS print string function) mov dx, 109 (Pointer to your message) int 21 (Call DOS) int 20 (Exit to DOS) [press Enter twice to exit assembly mode] : A widely recommended compatible replacement for the
DOSBox is primarily known for running classic DOS games, but it is equally powerful for running legacy development tools. Here is why DOSBox is ideal for DEBUG.EXE :
0AF7:0100 B44C MOV AH,4C 0AF7:0102 CD21 INT 21 -A 100 (Assemble starting at address 100) mov
You now have the emulator, but we still need the debugger file.