[mubios] Implement serial input and BIOS console key handling

Implement UART receive, transmit timeouts, configuration and status reporting for INT 14h functions 00h-03h. Initialize the BDA serial timeout and expose the driver interfaces.

Translate terminal characters and CSI/SS3 escape sequences into BIOS keyboard events for INT 16h. Add blocking reads, non-consuming status queries, enhanced key reads and keyboard buffer insertion.

1 files changed, 6 insertions, 0 deletions

diff --git a/mubios/include/bios.h b/mubios/include/bios.h
index 3c8b0dc..979e445 100644
--- a/mubios/include/bios.h
+++ b/mubios/include/bios.h
@@ -43,6 +43,12 @@ void bda_init (void);
 void serial_init (void);
 void serial_putc (u8 value);
 void serial_write (const char *text);
+u16 serial_timer_counter (void);
+u16 serial_status (u16 base);
+u16 serial_configure (u16 base, u8 parameters);
+u8 serial_transmit (u16 base, u8 value, u8 timeout);
+u8 serial_receive (u16 base, u8 *value, u8 timeout);
+int serial_try_receive (u16 base, u8 *value);
 
 u8 cmos_read8 (u8 index);