HelenOS sources

term_update_region  300 uspace/app/terminal/terminal.c 	term_update_region(term, bx, by, FONT_WIDTH, FONT_SCANLINES);
term_update_region  353 uspace/app/terminal/terminal.c 	term_update_region(term, 0, 0, pixelmap.width, pixelmap.height);
HelenOS homepage, sources at GitHub