Help with this assembly nasm homework

I have to modify this assembly code to make it work with 3x3 4x4 5x5

The goal is to implement the following changes to the Tic Tac Toe program that you were given: Unless overriden below, the rules and guidelines apply (example: no external libraries except the three syscalls: exit, read, write).

After asking the user if debugging should be enabled, ask the user for the size of the board. Available boards are 3x3, 4x4, and 5x5. The user should enter 3, 4, or 5 - anything else should cause the program to abort.

Rules for 4x4 and 5x5 boards are similar: each player needs to line up the right amount of their own symbol to win.

However... right after entering the board size, each user should, in turn, be asked to place a mine on the board. This mine will be invisible during play. The second player can place his own mine on the same position that the first player used for his mine (since player two cannot even see where player one put his mine).

The game now resumes as usual, but if player one places his mark on player twos mine, player two wins (and vice-versa). Players are immune to their own mine, and can safely play on that position.

The final board should reveal both mines. Unexploded mines should be represented by 1 and 2, identifying the player who placed them. If one mine blows off, represent it as ! or @, accordingly (chosen due to the characters position on the keyboard).

this is the source code i have to modify. it runs correctly in nasm. I just want it to work with 3x3 4x4 adn 5x5

thank you in advance

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%define cmpb cmp byte %define decb dec byte %define incb inc byte %define xorb xor byte %define movb mov byte %define movq mov qword section .bss ; Uninitialized data buffer resb 4 pfunc resq 1 section .data ; Initialized data mdbg db "Do you want to enable debug information?", 0xA mdbgl equ $ - mdbg mPXO db "Player X" mPXOl equ $ - mPXO mplay2 db ", choose your location (0-8):", 0xA, "Current board:", 0xA mplay2l equ $ - mplay2 mwin2 db " wins!", 0xA mwin2l equ $ - mwin2 spot equ 7 ; Offset of X/O magic equ 0x17 ; Magic! =D mtie db "It's a draw (tie)!", 0xA mtiel equ $ - mtie mfinal db "Final board:", 0xA mfinall equ $ - mfinal merr db "That location is out of range or already taken.", 0xA merrl equ $ - merr pbd1 db " | | ", 0xA pbd1l equ $ - pbd1 pbd2 db "-----", 0xA pbd2l equ $ - pbd2 dbd1 db " 012345678 ", 0xA, "[" dbd1l equ $ - dbd1 board db " " ; 3x3 linearized game board bdl equ $ - board dbd2 db "]", 0xA dbd2l equ $ - dbd2 ebd1 db "Current board (hex):", 0xA, " 0 1 2 3 4 5 6 7 8 ", 0xA, "[" ebd1l equ $ - ebd1 eboard db "20 58 20 4F 20 58 20 20 4F" ; Hex linearized game board el equ $ - eboard ebd2 db "]", 0xA ebd2l equ $ - ebd2 hexdigits db '0123456789ABCDEF' mbd1 db "Current board (mem):", 0xA, "&board = 0x" mbd1l equ $ - mbd1 mboard db "FFFFFFFFFFFFFFFF" ml equ $ - mboard mbd2 db 0xA, "+offset / hex / ASCII", 0xA mbd2l equ $ - mbd2 mbd3 db "0x0/: 58h X", 0xA ; The '/' is not a typo mbd3l equ $ - mbd3 lol db 2,1,6,3,8,4,9,9, \ 2,0,7,4,9,9,9,9, \ 1,0,8,5,6,4,9,9, \ 5,4,6,0,9,9,9,9, \ 5,3,7,5,8,0,6,2, \ 4,3,8,2,9,9,9,9, \ 8,7,3,0,4,2,9,9, \ 8,6,5,4,9,9,9,9, \ 7,6,5,2,4,0,9,9 top equ lol+7 kek db 5,3,5,3,7,3,5,3,5 section .text ; Code global _start ; Export entry point print_int: ; ecx: const char* msg, edx: size_t msgl mov eax,4 ; System call number (sys_write) mov ebx,1 ; First argument: file descriptor (stdout == 1) int 0x80 ; Call kernel ret read_int: ; ecx: char* msg, ; edx: size_t msgl mov eax,3 ; System call number (sys_read) xor ebx,ebx ; First argument: file descriptor (stdin == 0) int 0x80 ; Call kernel ret check_line: ; The offsets are expected in esi and edi mov bl,[mPXO+spot] ; One mark add bl,bl ; Two marks sub bl,[board+esi] ; One mark sub bl,[board+edi] ; Zero marks jz win ret tie: ; No return, (it's a tie) mov ecx,mtie ; Second argument: pointer to message to write mov edx,mtiel+mfinall ; Third argument: message length call print_int jmp pfinalb win: ; No return, (someone won) mov ecx,mPXO ; Second argument: pointer to message to write mov edx,mPXOl ; Third argument: message length call print_int mov ecx,mwin2 ; Second argument: pointer to message to write mov edx,mwin2l ; Third argument: message length call print_int mov ecx,mfinal ; Second argument: pointer to message to write mov edx,mfinall ; Third argument: message length call print_int ; Fallthrough pfinalb: ; No return, (print final board and exit) call [pfunc] mov eax,1 ; System call number (sys_exit) xor ebx,ebx ; First syscall argument: exit code int 0x80 ; Call kernel ; No ret debug_board: mov ecx,dbd1 ; Second argument: pointer to message to write mov edx,dbd1l+bdl+dbd2l ; Third argument: message length call print_int mov ecx,8 ; Locations hexboard: mov bl,[board+ecx] mov dx,'20' cmp bl,' ' cmove ax,dx mov dx,'58' cmp bl,'X' cmove ax,dx mov dx,'4F' cmp bl,'O' cmove ax,dx mov [eboard+2*ecx+ecx],al mov [eboard+2*ecx+ecx+1],ah dec ecx jns hexboard mov ecx,ebd1 ; Second argument: pointer to message to write mov edx,ebd1l+el+ebd2l ; Third argument: message length call print_int mov ecx,mbd1 ; Second argument: pointer to message to write mov edx,mbd1l+ml+mbd2l ; Third argument: message length call print_int mov rsi,board mov rdi,mbd3 memboard: incb [rdi+3] ; Counter mov bl,[rsi] ; Mark (ASCII) mov [rdi+10],bl mov dx,'20' cmp bl,' ' cmove ax,dx mov dx,'58' cmp bl,'X' cmove ax,dx mov dx,'4F' cmp bl,'O' cmove ax,dx mov [rdi+6],ax ; Mark (hex) mov ecx,mbd3 ; Second argument: pointer to message to write mov edx,mbd3l ; Third argument: message length call print_int inc rsi cmp rsi,board+9 jne memboard movb [rdi+3],'/' ; Reset counter ret print_board: xor esi,esi ; Row nrow: mov edi,2 ; Col ncol: mov dl,[board+esi+edi] ; Src mov [pbd1+edi*2],dl ; Dst dec edi jns ncol ; Three columns mov ecx,pbd1 ; Second argument: pointer to message to write add esi,3 ; Next row cmp esi,9 ; Last row je pdone mov edx,pbd1l+pbd2l ; Third argument: message length call print_int jmp nrow pdone: mov edx,pbd1l ; Third argument: message length call print_int ret _start: ; Enable debug? mov ecx,mdbg ; Second argument: pointer to message to write mov edx,mdbgl ; Third argument: message length call print_int ; Read answer mov ecx,buffer ; Store input at location 'buffer' mov edx,2 ; Read these many bytes call read_int ; Switch case cmpb [buffer],'Y' je do_debug cmpb [buffer],'y' je do_debug cmpb [buffer],'D' je do_debug cmpb [buffer],'d' je do_debug ; Default movq [pfunc],print_board jmp play do_debug: movq [pfunc],debug_board mov ecx,15 ; Offset of last hexdigit of address mov rdx, board ; rdx will be tampered with mov rbx, hexdigits ; Table memheader: mov rax,rdx ; Need nibble in al and rax,0x000000000000000f xlatb ; al updated mov byte [mboard+ecx],al dec ecx mov rax,rdx ; Need nibble in al and rax,0x00000000000000f0 shr rax,4 ; This time, higher nibble xlatb ; al updated mov byte [mboard+ecx],al shr rdx,8 ; Next byte (two nibbles) dec ecx jns memheader jmp play invalid: mov ecx,merr ; Second argument: pointer to message to write mov edx,merrl ; Third argument: message length call print_int ; Fallthrough play: ; Print messages and board mov ecx,mPXO ; Second argument: pointer to message to write mov edx,mPXOl+mplay2l ; Third argument: message length call print_int call [pfunc] ; Read input mov ecx,buffer ; Store input at location 'buffer' mov edx,2; ; Read these many bytes call read_int ; Validate movzx eax, byte [buffer] sub al,'0' ; Poor man's atoi cmp al,8 ja invalid ; Range is valid cmpb [board+eax],' ' ; Is empty? jne invalid ; Move is fully valid mov bl,[mPXO + spot] mov [board+eax],bl ; Place mark ; Check if winning move movzx ecx, byte [kek+eax] ; Terms (adjusted) pair: movzx esi, byte [lol+eax*8+ecx] dec ecx movzx edi, byte [lol+eax*8+ecx] call check_line dec ecx jns pair ; Next term pair decb [top] ; Check if tie jz tie xorb [mPXO+spot],magic ; Ready the other player's mark jmp play