--- /dev/null
+#include <lwk/driver.h>
+#include <lwk/console.h>
+#include <lwk/interrupt.h>
+#include <arch/io.h>
+
+// Serial port registers
+#define TXB 0 // Transmitter Holding Buffer W
+#define RXB 0 // Receiver Buffer R
+#define DLL 0 // Divisor Latch Low Byte R/W
+#define IER 1 // Interrupt Enable Register R/W
+#define DLH 1 // Divisor Latch High Byte R/W
+#define IIR 2 // Interrupt Identification Register R
+#define FCR 2 // FIFO Control Register W
+#define LCR 3 // Line Control Register R/W
+#define MCR 4 // Modem Control Register R/W
+#define LSR 5 // Line Status Register R
+#define MSR 6 // Modem Status Register R
+#define SCR 7 // Scratch Register R/W
+
+// IER bits
+#define IER_RLSI 0x08 // RX interrupt
+#define IER_THRI 0x02 // TX interrupt
+#define IER_RDI 0x01 // Reciver data interrupt
+
+// MCR bits
+#define MCR_DTR 0x01 // Enable DTR
+#define MCR_RTS 0x02 // Enable RTS
+#define MCR_OUT2 0x08 // Enable Out2 (?)
+
+// LSR bits
+#define LSR_TXEMPT 0x20 // Empty TX holding register
+#define LSR_RXRDY 0x01 // Ready to receive
+
+// LCR bits
+#define LCR_DLAB 0x80 // Divisor latch access bit
+
+/** IO port address of the serial port. */
+static unsigned int port = 0x3F8; // COM1
+
+/** Serial port baud rate. */
+static unsigned int baud = 9600;
+#define SERIAL_MAX_BAUD 115200
+
+/** Set when serial console has been initialized. */
+static int initialized = 0;
+
+/**
+ * Prints a single character to the serial port.
+ */
+static void serial_putc(unsigned char c)
+{
+ // Wait until the TX buffer is empty
+ while ((inb_p(port + LSR) & LSR_TXEMPT) == 0)
+ ;
+ // Slam the 8 bits down the 1 bit pipe... meeeooowwwy!
+ outb(c, port);
+}
+
+/**
+ * Writes a string to the serial port.
+ */
+static void serial_write(struct console *con, const char *str)
+{
+ unsigned char c;
+ while ((c = *str++) != '\0') {
+ serial_putc(c);
+ if (c == '\n') // new line
+ serial_putc('\r'); // tack on carriage return
+ }
+}
+
+/**
+ * Serial port console device.
+ */
+static struct console serial_console = {
+ .name = "Serial Console",
+ .write = serial_write
+};
+
+/**
+ * Initializes and registers the serial console driver.
+ */
+void serial_console_init(void)
+{
+ // Setup the divisor latch registers for the specified baud rate
+ unsigned int div = SERIAL_MAX_BAUD / baud;
+
+ if (initialized) {
+ printk(KERN_ERR "Serial console already initialized.\n");
+ return;
+ }
+
+ outb( inb(port+LCR) | LCR_DLAB , port+LCR ); // set DLAB
+ outb( (div>>0) & 0xFF , port+DLL ); // set divisor low byte
+ outb( (div>>8) & 0xFF , port+DLH ); // set divisor high byte
+ outb( inb(port+LCR) & ~LCR_DLAB , port+LCR ); // unset DLAB
+
+ outb( 0x0 , port+IER ); // Disable serial port interrupts
+ outb( 0x0 , port+FCR ); // Don't use the FIFOs
+ outb( 0x3 , port+LCR ); // 8n1
+
+ // Setup modem control register
+ outb( MCR_RTS | MCR_DTR | MCR_OUT2 , port+MCR);
+
+ console_register(&serial_console);
+ initialized = 1;
+}
+
+driver_init(serial_console_init);
+
+/**
+ * Configurable parameters for controlling the serial port
+ * I/O port address and baud.
+ */
+driver_param(port, uint);
+driver_param(baud, uint);
+
