Merge eae470221b into 7aff64740e

2 years ago · 7dd20685d2
parent 7aff64740e eae470221b
commit 7dd20685d2
1 changed files with 3 additions and 5 deletions
--- a/17-video-scroll/drivers/screen.c
+++ b/17-video-scroll/drivers/screen.c
@ -83,11 +83,9 @@ int print_char(char c, int col, int row, char attr) {

    /* Check if the offset is over screen size and scroll */
    if (offset >= MAX_ROWS * MAX_COLS * 2) {
-        int i;
-        for (i = 1; i < MAX_ROWS; i++) 
-            memory_copy(get_offset(0, i) + VIDEO_ADDRESS,
-                        get_offset(0, i-1) + VIDEO_ADDRESS,
-                        MAX_COLS * 2);
+        memory_copy(get_offset(0, 1) + VIDEO_ADDRESS,
+                    get_offset(0, 0) + VIDEO_ADDRESS,
+                    MAX_COLS * (MAX_ROWS - 1) * 2);

        /* Blank last line */
        char *last_line = get_offset(0, MAX_ROWS-1) + VIDEO_ADDRESS;