Assembler: using debug.exe to write DOS programs

C:\WINDOWS\system32\debug.exe

Windows (XP) still comes with Debug.

C:\test>DEBUG
-a
0C8A:0100 mov ax,0200
0C8A:0103 mov dx,0041
0C8A:0106 int 21
0C8A:0108 int 20
0C8A:010A
-h 010A 0100
020A  000A
-n PCHAR.COM
-rcx
CX 0000
:000A
-w
Writing 0000A bytes
-q

C:\test>PCHAR.COM
A

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Assembler: Hello, World!

DOS, x86, 16bit, debug.exe

mov ax,0200
mov dx,0048
int 21
mov dx,0065
int 21
mov dx,006C
int 21
mov dx,006C
int 21
mov dx,006F
int 21
mov dx,002C
int 21
mov dx,0020
int 21
mov dx,0057
int 21
mov dx,006F
int 21
mov dx,0072
int 21
mov dx,006C
int 21
mov dx,0064
int 21
mov dx,0021
int 21
int 20