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section .data
; escape code for clearing the screen
clear db 0x1B, '[2J', 0x1B, '[H', 0
clear_len equ $ - clear
section .bss
; adress for syscall for write_byte wrapper
byte_to_write resb 1
section .text
global write_byte
global clear_screen
write_byte:
push rdi
mov byte [byte_to_write], al
mov rax, 1
mov rdi, 1
mov rsi, byte_to_write
mov rdx, 1
syscall
pop rdi
ret
clear_screen:
push rdi
mov rax, 1
mov rdi, 1
mov rsi, clear
mov rdx, clear_len
syscall
pop rdi
ret
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