VGA / Drawing (src/vga.c)

Functions:

• vga_putcell(x,y,ch,attr) — Write a character cell to VGA text buffer with bounds checking.
• vga_clear() — Clear the screen and reset cursor.
• term_putc(c) — Terminal character output with newline/tab handling and automatic scrolling.
• term_write(s) — Write a NUL-terminated string to the terminal.
• draw_box(x,y,w,h,title,...) — Draw a framed box with optional title and background attribute.
• draw_text_in_win(x,y,w,h,wx,wy,text,attr) — Draw text inside a window region with wrapping and newline/tab handling.
• vga_getcell_char(x,y), vga_getcell_attr(x,y) — Read character and attribute at a screen cell.

Source: src/vga.c