$NetBSD: patch-ab,v 1.4 2025/04/21 16:28:00 wiz Exp $

--- icd.c.orig	2001-03-29 10:29:01.000000000 +0000
+++ icd.c
@@ -12,6 +12,10 @@
 
 #define BAUDRATE B57600
 
+#if defined(__DragonFly__) && !defined(O_SYNC)
+#define O_SYNC O_FSYNC
+#endif
+
 int icd_fd;  /* file descriptor for serial port */
 int controller_type=-1;
 
@@ -278,7 +282,7 @@ int icd_init(char *port)
 {
 	struct termios oldtio, newtio;
 
-	if((icd_fd=open(port, O_NOCTTY | O_RDWR | O_SYNC)) == -1) {
+	if((icd_fd=open(port, O_NOCTTY | O_RDWR | O_SYNC | O_NONBLOCK)) == -1) {
 		perror("Error opening device:");
 		return -1;
 	}
@@ -286,10 +290,11 @@ int icd_init(char *port)
 	tcgetattr(icd_fd, &oldtio);
 
 	memset(&newtio,0, sizeof(newtio));
-	newtio.c_cflag = BAUDRATE | CS8 | CLOCAL | CREAD;
+	newtio.c_cflag = CS8 | CLOCAL | CREAD;
 	newtio.c_iflag = IGNPAR;
 	newtio.c_oflag =  0;
 	newtio.c_lflag =  0;
+	newtio.c_ispeed = newtio.c_ospeed = BAUDRATE;
 
 	newtio.c_cc[VTIME] = 20;
         newtio.c_cc[VMIN] = 0;
@@ -297,6 +302,8 @@ int icd_init(char *port)
 	tcflush(icd_fd, TCIFLUSH);
 	tcsetattr(icd_fd, TCSANOW, &newtio);
 
+	fcntl(icd_fd, F_SETFL, 0); /* clear nonblock */
+	
 	icd_hw_reset();
 
 	rts_set();