First attempt at adding serial port emulated via named pipe on host.

src/Makefile

@@ -1,7 +1,7 @@
 CLI=rk65c02cli
 CLI_OBJS=rk65c02cli.o
 
-LIB_OBJS=rk65c02.o bus.o instruction.o emulation.o debug.o device_ram.o
+LIB_OBJS=rk65c02.o bus.o instruction.o emulation.o debug.o device_ram.o device_serial.o
 LIB_SO=librk65c02.so
 LIB_STATIC=librk65c02.a
 

src/device_serial.c

@@ -0,0 +1,80 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+//#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "bus.h"
+#include "device.h"
+
+const static char *pipepath = "/tmp/serial"; /* should really be configurable */
+
+struct device_serial_priv {
+	int pipefd;
+};
+
+uint8_t device_serial_read_1(void *, uint16_t);
+void device_serial_write_1(void *, uint16_t, uint8_t);
+
+uint8_t
+device_serial_read_1(void *vd, uint16_t offset)
+{
+	device_t *d;
+	struct device_serial_priv *dp;
+
+	d = (device_t *) vd;
+	dp = d->aux;
+
+	// XXX: TODO
+
+	return 0xAA;
+}
+
+void
+device_serial_write_1(void *vd, uint16_t offset, uint8_t val)
+{
+	device_t *d;
+	struct device_serial_priv *dp;
+
+	d = (device_t *) vd;
+	dp = d->aux;
+
+	write(dp->pipefd, &val, 1);
+	fsync(dp->pipefd);
+}
+
+device_t *
+device_serial_init()
+{
+	device_t *d;
+	struct device_serial_priv *dp;
+
+	d = (device_t *) malloc(sizeof(device_t));
+
+	assert(d != NULL);
+
+	d->name = "Serial";
+	d->size = 4;
+
+	d->read_1 = device_serial_read_1;
+	d->write_1 = device_serial_write_1;
+
+	dp = (struct device_serial_priv *) malloc(sizeof(struct device_serial_priv));
+	d->aux = dp; 
+
+	dp->pipefd = mkfifo(pipepath, 600);
+
+	return d;
+}
+
+void
+device_serial_finish(device_t *d)
+{
+	free(d->aux);
+	//close pipe
+}
+

src/device_serial.h

@@ -0,0 +1,10 @@
+#ifndef _DEVICE_SERIAL_H_
+#define _DEVICE_SERIAL_H_
+
+#include "device.h"
+
+device_t * device_serial_init();
+void device_serial_finish(device_t *);
+
+#endif /* _DEVICE_SERIAL_H_ */
+