DOS resets the serial ports reported by the BIOS. This can mess up debugging and timing when the serial baud rate changes on the debug port. The new "etc/advertise-serial-debug-port" option allows one to suppress the debug serial port from the normal list of serial ports the BIOS reports to DOS.
Signed-off-by: Kevin O'Connor <[email protected]> --- src/serial.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/serial.c b/src/serial.c index 9b6d29f..00c6eb7 100644 --- a/src/serial.c +++ b/src/serial.c @@ -9,6 +9,7 @@ #include "bregs.h" // struct bregs #include "hw/serialio.h" // SEROFF_IER #include "output.h" // debug_enter +#include "romfile.h" // romfile_loadint #include "stacks.h" // yield #include "util.h" // serial_setup @@ -20,6 +21,9 @@ static u16 detect_serial(u16 port, u8 timeout, u8 count) { + if (CONFIG_DEBUG_SERIAL && port == CONFIG_DEBUG_SERIAL_PORT + && !romfile_loadint("etc/advertise-serial-debug-port", 1)) + return 0; outb(0x02, port+SEROFF_IER); u8 ier = inb(port+SEROFF_IER); if (ier != 0x02) -- 1.8.3.1 _______________________________________________ SeaBIOS mailing list [email protected] http://www.seabios.org/mailman/listinfo/seabios
