Download Debug Exe For Dosbox Windows Apr 2026

-A 100 0AF7:0100 MOV AH, 4C 0AF7:0102 INT 21 0AF7:0104 [Press Enter] Now run it with G (Go). The program will exit back to DEBUG. To see what’s at address 0100 :

C:\DOS> DEBUG You should see a single dash - prompt. That’s it – you are now inside the debugger. Download Debug Exe For Dosbox Windows

AX=0000 BX=0000 CX=0000 DX=0000 SP=FFEE BP=0000 SI=0000 DI=0000 DS=0AF7 ES=0AF7 SS=0AF7 CS=0AF7 IP=0100 NV UP EI PL NZ NA PO NC 0AF7:0100 CD20 INT 20 This shows all 16-bit registers and the next instruction to execute. -A 100 0AF7:0100 MOV AH, 4C 0AF7:0102 INT

To change a register value, e.g., set BX to 1234 : That’s it – you are now inside the debugger

Happy debugging.

R BX DEBUG will show the current value and wait for a new hex value. Type 1234 and press Enter. Let’s write a one-instruction program that exits cleanly: