Initial commit

10.asm

@@ -0,0 +1,28 @@
+; Hello World Program (Count to 10)
+; Compile with: nasm -f elf helloworld-10.asm
+; Link with (64 bit systems require elf_i386 option): ld -m elf_i386 helloworld-10.o -o helloworld-10
+; Run with: ./helloworld-10
+ 
+%include        'functions.asm'
+ 
+SECTION .text
+global  _start
+ 
+_start:
+ 
+    mov     ecx, 0          ; ecx is initalised to zero.
+ 
+nextNumber:
+    inc     ecx             ; increment ecx
+ 
+    mov     eax, ecx        ; move the address of our integer into eax
+    add     eax, 48         ; add 48 to our number to convert from integer to ascii for printing
+    push    eax             ; push eax to the stack
+    mov     eax, esp        ; get the address of the character on the stack
+    call    sprintLF        ; call our print function
+ 
+    pop     eax             ; clean up the stack so we don't have unneeded bytes taking up space
+    cmp     ecx, 10        ; have we reached 10 yet? compare our counter with decimal 10
+    jne     nextNumber      ; jump if not equal and keep counting
+ 
+    call    quit

10adv.asm

@@ -0,0 +1,22 @@
+; Hello World Program (Count to 10 itoa)
+; Compile with: nasm -f elf helloworld-itoa.asm
+; Link with (64 bit systems require elf_i386 option): ld -m elf_i386 helloworld-itoa.o -o helloworld-itoa
+; Run with: ./helloworld-itoa
+ 
+%include        'functions.asm'
+ 
+SECTION .text
+global  _start
+ 
+_start:
+ 
+    mov     ecx, 0
+ 
+nextNumber:
+    inc     ecx
+    mov     eax, ecx
+    call    iprintLF        ; NOTE call our new integer printing function (itoa)
+    cmp     ecx, 100000
+    jne     nextNumber
+ 
+    call    quit

CeasarCipher.asm

@@ -0,0 +1,82 @@
+%include 'functions.asm'
+
+section .data
+title db  "Ceasar Cipher!",0h
+format db "-------------------------------------------",0h
+msg db "Plaintext string is:",0h
+plaintext db  "Love Assembly programming",0h
+stringlen db "String length is:",0h
+ciphertext db "Encrypted text:",0h
+key db 3
+alphabet: db 'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'
+   
+section .bss
+strlen db 2 
+ciphertext db 254     
+             
+                
+section .text
+global _start
+
+
+_start:
+;Title of program
+mov eax,format
+call sprintLF
+mov eax,title
+call sprintLF
+mov eax,format
+call sprintLF
+
+;print the plaintext
+mov eax,msg
+call sprint
+mov eax,plaintext
+call sprintLF
+
+;get plaintext length and print it
+mov eax,plaintext
+call slen
+push eax
+mov eax,stringlen
+call sprint
+pop eax
+mov [strlen],eax
+call iprintLF
+
+
+assign:
+mov ebx,0
+jmp getpos
+
+getpos:
+cmp [alphabet+ebx],eax
+je pos
+inc ebx
+jmp getpos
+
+pos:
+push ebx
+ret
+
+Encrypt:
+mov edx,0
+cmp [strlen],ecx
+je exit
+mov eax,byte[plaintext+edx]
+call getpos
+pop e
+
+
+exit:
+call quit
+
+
+
+
+
+
+
+
+
+   

CreateDir.asm

@@ -0,0 +1,46 @@
+;args passed to an asm prog are loaded in reverse order
+;The name of the program is then loaded onto the stack 
+;and lastly the total number of arguments is loaded onto the stack.
+section .text
+global _start
+
+_start:
+;The last two stack items for a NASM compiled program 
+;are always the name of the program and the number of
+;passed arguments,pop the first value, no of args from stack
+pop ecx
+
+;iterate through the args
+nextarg:
+	cmp ecx,0h
+	jz exit ;if equal exit program
+	pop eax  ; pop the next argument off the stack
+	call createdirs ;call createDirs func
+	dec ecx ;mov to next arg.You dec ecx by 1
+	jmp nextarg ;iterate
+
+
+;create dirs function
+createdirs:
+
+;save registers
+push ebx 
+push ecx
+push eax
+
+mov ebx,eax ;get dirname 
+mov ecx,0666 ;add file permission e.g. 0777
+mov eax,39 ;sys_mkdir
+int 80h;call kernel
+
+;restore registers
+pop eax ;pop registers in LIFO order
+pop ecx
+pop ebx
+ret
+
+;exit prog
+exit:
+mov eax,1
+int 80h
+

EvenNo.asm

@@ -0,0 +1,45 @@
+%include 'functions.asm'
+section .data
+design db '***********************',0h
+msg db 'Even Numbers',0h
+
+section .text
+global _start
+
+_start:
+
+decorate:
+mov eax,design
+call sprintLF
+mov eax,msg
+call sprintLF
+mov eax,design
+call sprintLF
+mov ecx,1
+
+
+
+even:
+cmp ecx,20
+je exit
+mov eax,ecx
+mov ebx,2
+div ebx
+mov esi,edx
+cmp esi,0
+je printf
+inc ecx
+jmp even
+
+
+printf:
+mov eax,ecx
+call iprintLF
+inc ecx
+jmp even
+
+exit:
+call quit
+
+
+

Fibonnaci.asm

@@ -0,0 +1,74 @@
+%include 'functions.asm'
+ 
+section .data
+input db "Enter range:",0h
+fiboseries db "Fibonacci series of range: ",0h
+line db "-----------------------------------",0h
+comma db ","
+end db "",0h
+ 
+section .bss
+;reservered variables spaces
+first   resd 1
+second  resd 1
+next    resw 1
+range   resw 1
+count   resw 1
+section .text
+global _start
+ 
+_start:
+ 
+; User prompt
+;mov eax,input
+;call sprint
+ 
+; Print range message and input
+	mov eax,fiboseries
+	call sprint
+; Get Input failed manually enter range
+	mov eax, 10
+	mov [range], eax
+	mov ecx,range
+	call iprintLF
+ 
+; initilise primes
+	mov ebx,0
+	mov dword[first],0
+	mov dword[second],1
+ 
+main_loop:
+	inc ebx
+ 
+		mov eax, dword[first]
+		call iprint
+		mov eax,comma
+		call sprint
+ 
+		mov eax, dword[second]
+		call iprint
+		mov eax,comma
+		call sprint
+ 
+		mov eax, dword[second]
+		add dword[first],eax
+ 
+		mov eax, dword[first]
+		add dword[second],eax
+ 
+	cmp ebx,[range] 
+jne main_loop
+ 
+ 
+exit:
+	mov eax,end
+	call sprintLF
+	call quit
+ 
+getInput:
+	mov eax,3
+	mov ebx,2
+	mov ecx,range
+	mov edx,2
+	int 80h
+ret