#pragma once

#define COM1 0x3F8

void serial_init(void);
void serial_putchar(char ch);
void serial_puts(char *str);
char serial_get_byte(void);
char serial_getchar(void);
int serial_received(void);


/* Mask the UART receive-data-available IRQ (IER bit 0). Used by the
 * breakpoint debugger so bytes typed while it polls serial_getchar() are
 * not silently consumed by serial_irq_handler() and pushed into the input
 * ring instead of being delivered to the debugger. */
void serial_disable_rx_irq(void);

/* Re-arm the UART receive-data-available IRQ and drain anything that
 * accumulated in the RBR while the IRQ was masked. Mirror of
 * serial_disable_rx_irq(). */
void serial_enable_rx_irq(void);