diff -ruN --exclude=CVS /usr/ports/emulators/simh/Makefile /home/trasz/simh/Makefile
--- /usr/ports/emulators/simh/Makefile	Wed Mar 28 08:17:18 2007
+++ /home/trasz/simh/Makefile	Sat Mar 31 17:48:57 2007
@@ -7,6 +7,7 @@
 
 PORTNAME=	simh
 PORTVERSION=	3.7
+PORTREVISION=	1
 CATEGORIES=	emulators
 MASTER_SITES=	http://simh.trailing-edge.com/sources/
 DISTNAME=	${PORTNAME}v37-0
@@ -46,6 +47,9 @@
 
 pre-patch:
 	@${MKDIR} ${WRKSRC}/BIN
+
+post-patch:
+	${REINPLACE_CMD} -e 's|%%PREFIX%%|${PREFIX}|' ${WRKSRC}/VAX/vax_sysdev.c
 
 do-install:
 .for file in ${BIN_FILES}
diff -ruN --exclude=CVS /usr/ports/emulators/simh/files/patch-VAX-vax_sysdev.c /home/trasz/simh/files/patch-VAX-vax_sysdev.c
--- /usr/ports/emulators/simh/files/patch-VAX-vax_sysdev.c	Thu Jan  1 01:00:00 1970
+++ /home/trasz/simh/files/patch-VAX-vax_sysdev.c	Sat Mar 31 17:48:57 2007
@@ -0,0 +1,19 @@
+--- VAX/vax_sysdev.c.orig	Sat Mar 24 09:13:42 2007
++++ VAX/vax_sysdev.c	Sat Mar 24 09:17:45 2007
+@@ -1524,8 +1524,15 @@
+     if (sim_log) fprintf (sim_log, 
+         "Loading boot code from ka655x.bin\n");
+     r = load_cmd (0, "-R ka655x.bin");
+-    if (r != SCPE_OK) return r;
++    if (r != SCPE_OK) {
++        printf ("Loading boot code from %%PREFIX%%/share/simh/ka655x.bin\n");
++        if (sim_log) fprintf (sim_log, 
++            "Loading boot code from %%PREFIX%%/share/simh/ka655x.bin\n");
++        r = load_cmd (0, "-R %%PREFIX%%/share/simh/ka655x.bin");
++        if (r != SCPE_OK)
++    	    return r;
+     }
++}
+ return SCPE_OK;
+ }
+