2023-04-24 20:00:51 +00:00
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2023-04-25 19:12:35 +00:00
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; cx: len_buffer
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; si: buffer
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; dl: start_x NOTE: Will contain the end of the text on-screen
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; dh: start_y NOTE: Will contain the end of the text on-screen
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print_string:
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.prolog:
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push di
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push cx
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push bx
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push ax
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xor di, di ; character index
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.printing_loop:
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.set_cursor_position:
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mov ah, 0x02
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mov bh, 0
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int 0x10
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.write_character:
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push cx ; save len_buffer
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; get the current character
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mov bx, si
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add bx, di
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mov al, [bx]
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; al now contains the current character
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; set the other needed interrupt values
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mov ah, 0x0a ; wanted function (write character at cursor position)
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mov bh, 0 ; page number
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mov cx, 1 ; repetitions of character
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int 0x10 ; call bios basic draw functions
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pop cx ; restore len_buffer
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inc dl ; go to next column
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; go to a new line if needed
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cmp dl, 80
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jb .no_new_line_needed
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xor dl, dl
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inc dh ; increase column
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.no_new_line_needed:
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inc di ; go to next character
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; go further if the string-printing hasn't been finished
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cmp di, cx
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jb .printing_loop
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.epilog:
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pop ax
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pop bx
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pop cx
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pop di
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ret
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