tag	line	file	source code
UART_SCR	2304	drivers/char/serial.c	scratch = serial_in(info, UART_SCR);
UART_SCR	2305	drivers/char/serial.c	serial_outp(info, UART_SCR, 0xa5);
UART_SCR	2306	drivers/char/serial.c	status1 = serial_in(info, UART_SCR);
UART_SCR	2307	drivers/char/serial.c	serial_outp(info, UART_SCR, 0x5a);
UART_SCR	2308	drivers/char/serial.c	status2 = serial_in(info, UART_SCR);
UART_SCR	2309	drivers/char/serial.c	serial_outp(info, UART_SCR, scratch);