diff options
Diffstat (limited to 'main.asm')
| -rw-r--r-- | main.asm | 84 |
1 files changed, 44 insertions, 40 deletions
diff --git a/main.asm b/main.asm index f20699a..1ba1eb5 100644 --- a/main.asm +++ b/main.asm @@ -1,17 +1,5 @@ section .data - ; cursor management - reset_cursor db 0x1B , '[H', 0 - reset_cursor_len equ $ - reset_cursor - up_cursor db 0x1B , '[A', 0 - up_cursor_len equ $ - up_cursor - bottom_cursor db 0x1B , '[B', 0 - bottom_cursor_len equ $ - bottom_cursor - right_cursor db 0x1B , '[C', 0 - right_cursor_len equ $ - right_cursor - left_cursor db 0x1B , '[D', 0 - left_cursor_len equ $ - left_cursor - ; example messages for later message1 db "Hello, World!", 0xA msg_len1 equ $ - message1 @@ -19,7 +7,8 @@ section .data msg_len2 equ $ - message2 ; array of snake - 1000 thousand bytes means max length is 500 - ; head is at snake[0] + ; x head is at snake[0] + ; y head is at snake[1] snake TIMES 1000 db 0 ; direction of the snake: @@ -28,6 +17,9 @@ section .data ; 1 direction db 0 + timespec dq 0 + dq 500000000 + section .bss buffer resb 1 @@ -43,53 +35,65 @@ section .text extern draw_border extern write_byte extern clear_screen + extern reset_cursor + extern move_cursor_right + extern move_cursor_down global _start draw_snake: push rbx + call reset_cursor mov bh, byte [snake] mov bl, byte [snake+1] -_10: + +_10:call move_cursor_right + dec bh + cmp bh, 0 + jnz _10 +_11:call move_cursor_down + dec bl + cmp bl, 0 + jnz _11 + + mov rax, 'x' + call write_byte pop rbx + call reset_cursor ret _start: - call clear_screen - call draw_border - mov byte [snake], 5 mov byte [snake+1], 5 - mov rax, 1 - mov rdi, 1 - mov rsi, reset_cursor - mov rdx, reset_cursor_len - syscall - mov rax, 1 - mov rdi, 1 - mov rsi, bottom_cursor - mov rdx, bottom_cursor_len - syscall - mov rax, 1 - mov rdi, 1 - mov rsi, right_cursor - mov rdx, right_cursor_len - syscall +main_loop: + call clear_screen + call draw_border + call draw_snake - mov rax, 0 ; Syscall for read - mov rdi, 0 ; stdin - mov rsi, buffer ; Address of the buffer - mov rdx, 1 ; Read 1 byte + lea rdi, [timespec] ; Pointer to timespec struct (rdi) + xor rsi, rsi ; NULL (no remaining time) + mov rax, 35 ; Syscall number for nanosleep syscall + inc byte [snake] + + jmp main_loop + +; mov rax, 0 ; Syscall for read +; mov rdi, 0 ; stdin +; mov rsi, buffer ; Address of the buffer +; mov rdx, 1 ; Read 1 byte +; syscall + ; If a key was pressed, store it in `input` - test rax, rax ; Check if any input was received - jz exit ; If no input, skip - mov al, byte [buffer]; Load the input character +; test rax, rax ; Check if any input was received +; jz exit ; If no input, skip + +; mov al, byte [buffer]; Load the input character ;mov rax, 'x' - call write_byte +; call write_byte exit: ; exit syscall with return code 0 mov rax, 60 |