haneen2002 / x-o

xo project in assembly language

X-O

xo project in assembly language

; You may customize this and other start-up templates ; ; The location of this template is c:\emu8086\inc\0_com_template.txt;

org 100h

include emu8086.inc

.data

position db ? game_start_message db " TIC TAC TOE ",13,10,0 player1_message db "player 1, enter a number: ",0 player2_message db "player 2, enter a number: ",0

invalid_input_message db "invalid input, try again: ",0 filled_position_message db "filled position, try again: ",0

board equ 0x500

.code

start:

lea si,game_start_message
call print_string
putc 0dh
putc 0ah
print "player 1 (x) - player 2 (o)"
putc 0dh
putc 0ah
putc 0dh
putc 0ah

mov bx,board       
mov cx,9
mov al,'1' 

init_board:

;initialization of the board with characters '1'.....'9'
mov [bx],al
inc al
inc bx 

loop init_board

mov cx,0

main_loop:

call show_board  
call find_line
putc 0dh
putc 0ah
lea si,player1_message
call print_string
call get_input
mov byte[bx],'x'
call CLEAR_SCREEN
call show_board 
call find_line
putc 0dh
putc 0ah
lea si,player2_message
call print_string
call get_input
mov byte[bx],'o'
call CLEAR_SCREEN
jmp main_loop

show_board: mov bx,board call show_row call show_divider mov bx,board+3 call show_row call show_divider mov bx,board+6 call show_row
ret

show_row: call show_square putc 032 putc '|' putc 032 call show_square putc 032 putc '|'
putc 032 call show_square putc 0dh putc 0ah ret

show_divider:

putc '_'
putc '_'
putc '_'
putc '_'
putc '_'
putc '_'
putc '_'
putc '_'
putc '_' 
putc 0dh
putc 0ah
putc 0dh
putc 0ah
ret

show_square: mov al,[bx] inc bx putc al ret

get_input:

mov dx,2 ; 2 refers to the orginal character entered + null character
mov di, offset position
call GET_STRING 
mov al,position
cmp al,0x1b
je exit_dos
cmp al,'1'             
jc invalid_input ;we got character smaller than '1' , try again 
cmp al,':'
jnc invalid_input ;we got character greater than '9' , try again 
cmp al,'1'
je  pos1 
cmp al,'2'
je  pos2
cmp al,'3'
je  pos3  
cmp al,'4'
je  pos4
cmp al,'5'
je  pos5
cmp al,'6'
je  pos6 
cmp al,'7'
je  pos7
cmp al,'8'
je  pos8
cmp al,'9'
je  pos9

exit_input:

putc 0ah
putc 0dh
ret

invalid_input:

putc 0dh
putc 0ah
lea si,invalid_input_message
call print_string
jmp get_input   ;when we used call, an error happened

pos1: mov bx,board cmp [bx],'o' je filled_position cmp [bx],'x' je filled_position inc cx
jmp exit_input pos2: mov bx,board+1 cmp [bx],'o' je filled_position cmp [bx],'x' je filled_position inc cx
jmp exit_input pos3: mov bx,board+2 cmp [bx],'o' je filled_position cmp [bx],'x' je filled_position inc cx
jmp exit_input pos4: mov bx,board+3 cmp [bx],'o' je filled_position cmp [bx],'x' je filled_position inc cx
jmp exit_input pos5: mov bx,board+4 cmp [bx],'o' je filled_position cmp [bx],'x' je filled_position inc cx
jmp exit_input pos6: mov bx,board+5 cmp [bx],'o' je filled_position cmp [bx],'x' je filled_position inc cx
jmp exit_input pos7: mov bx,board+6 cmp [bx],'o' je filled_position cmp [bx],'x' je filled_position inc cx
jmp exit_input pos8: mov bx,board+7 cmp [bx],'o' je filled_position cmp [bx],'x' je filled_position inc cx
jmp exit_input pos9: mov bx,board+8 cmp [bx],'o' je filled_position cmp [bx],'x' je filled_position inc cx
jmp exit_input

filled_position:

putc 0dh
putc 0ah
lea si,filled_position_message
call print_string
jmp get_input   ;when we used call, an error happened    

find_line:

;first row
mov al,[board]
cmp al,[board+1]
jne p03
cmp al,[board+2]
je won

p03: ;leftmost column cmp al,[board+3] jne p04 cmp al,[board+6] je won

p04: ;first diagonal cmp al,[board+4] jne p05 cmp al,[board+8] je won

p05: ;second row , reload value

mov al,[board+3]
cmp al,[board+4]
jne p06
cmp al,[board+5]
je won

p06: ;third row , reload value

mov al,[board+6]
cmp al,[board+7]
jne p01
cmp al,[board+8]
je won

p01: ;middle column , reload value

mov al,[board+1]
cmp al,[board+4]
jne p02
cmp al,[board+7]
je won 

p02: ;rightmost column , reload value

mov al,[board+2]
cmp al,[board+5]
jne p07
cmp al,[board+8]
je won

p07: ;second diagonal cmp al,[board+4] jne p08 cmp al,[board+6] je won

p08: cmp cx,9 je game_over ret

won:

cmp al,'x' je player1_won

jmp player2_won

player1_won:

putc 0dh
putc 0ah
print 'congratulations, player 1 win '
mov al,0x01
putc al     ;ascii for happy face
putc 0dh
putc 0ah
jmp exit_dos

player2_won:

putc 0dh
putc 0ah
print 'congratulations, player 2 win '
mov al,0x01   ;ascii for happy face
putc al     
putc 0dh
putc 0ah
jmp exit_dos

game_over:

putc 0dh
putc 0ah
print 'Game Draw'
jmp exit_dos    

exit_dos:

int 0x20                         

ret DEFINE_PRINT_STRING DEFINE_CLEAR_SCREEN DEFINE_GET_STRING end