HelenOS sources
term_update_char 285 uspace/app/terminal/terminal.c term_update_char(term, pixelmap, sx, sy, col, row);
term_update_char 315 uspace/app/terminal/terminal.c term_update_char(term, pixelmap, sx, sy, back_col, back_row);
term_update_char 321 uspace/app/terminal/terminal.c term_update_char(term, pixelmap, sx, sy, back_col, back_row);
term_update_char 322 uspace/app/terminal/terminal.c term_update_char(term, pixelmap, sx, sy, front_col, front_row);
term_update_char 378 uspace/app/terminal/terminal.c term_update_char(term, &pixelmap, sx, sy, x, y);
term_update_char 435 uspace/app/terminal/terminal.c term_update_char(term, &pixelmap, sx, sy, x, y);
HelenOS homepage, sources at GitHub