addsubr.asm

想学习汇编语言的

TITLE Add and Subtract              (AddSubR.asm)

; This program adds and subtracts 32-bit integers.
; 16-bit Real mode version.
; Last update: 2/1/02

.MODEL small,stdcall
.STACK 4096
.386

DumpRegs PROTO

.code
main PROC
	mov ax,@data		; data seg address
	mov ds,ax		; copy to DS
	mov es,ax		; copy to ES

	mov eax,10000h		; EAX = 10000h
	add eax,40000h		; EAX = 50000h
	sub eax,20000h		; EAX = 30000h
	call DumpRegs

	mov ah,4Ch		; exit process
	mov al,0		; return code = 0
	int 21h		; call MS-DOS function
main ENDP
END main