diff --git a/libs/gamecode/engine/pr_debug.c b/libs/gamecode/engine/pr_debug.c
index b23cac36d..a0671e75a 100644
--- a/libs/gamecode/engine/pr_debug.c
+++ b/libs/gamecode/engine/pr_debug.c
@@ -148,7 +148,7 @@ PR_Load_Source_File (progs_t *pr, const char *fname)
 		int         len;
 		len = strlen (*dir) + strlen (fname) + 2;
 		path = Hunk_TempAlloc (len);
-		sprintf (path, "%s/%s", *dir, fname);
+		sprintf (path, "%s%s%s", *dir, **dir ? "/" : "", fname);
 		f->text = pr->load_file (pr, path);
 	}
 	if (!f->text) {
diff --git a/libs/gamecode/engine/pr_opcode.c b/libs/gamecode/engine/pr_opcode.c
index 0e25fe977..0595f47de 100644
--- a/libs/gamecode/engine/pr_opcode.c
+++ b/libs/gamecode/engine/pr_opcode.c
@@ -572,26 +572,32 @@ opcode_t pr_opcodes[] = {
 	{"!", "not.f", OP_NOT_F, false,
 	 ev_float, ev_void, ev_integer,
 	 PROG_ID_VERSION,
+	 "%Ga, %gc",
 	},
 	{"!", "not.v", OP_NOT_V, false,
 	 ev_vector, ev_void, ev_integer,
 	 PROG_ID_VERSION,
+	 "%Ga, %gc",
 	},
 	{"!", "not.s", OP_NOT_S, false,
 	 ev_string, ev_void, ev_integer,
 	 PROG_ID_VERSION,
+	 "%Ga, %gc",
 	},
 	{"!", "not.ent", OP_NOT_ENT, false,
 	 ev_entity, ev_void, ev_integer,
 	 PROG_ID_VERSION,
+	 "%Ga, %gc",
 	},
 	{"!", "not.fnc", OP_NOT_FNC, false,
 	 ev_func, ev_void, ev_integer,
 	 PROG_ID_VERSION,
+	 "%Ga, %gc",
 	},
 	{"!", "not.p", OP_NOT_P, false,
 	 ev_pointer, ev_void, ev_integer,
 	 PROG_VERSION,
+	 "%Ga, %gc",
 	},
 
 	{"<IF>", "if", OP_IF, false,
@@ -828,6 +834,7 @@ opcode_t pr_opcodes[] = {
 	{"!", "not.i", OP_NOT_I, false,
 	 ev_integer, ev_void, ev_integer,
 	 PROG_VERSION,
+	 "%Ga, %gc",
 	},
 	{"==", "eq.i", OP_EQ_I, false,
 	 ev_integer, ev_integer, ev_integer,
@@ -849,6 +856,7 @@ opcode_t pr_opcodes[] = {
 	{"!", "not.u", OP_NOT_U, false,
 	 ev_uinteger, ev_void, ev_integer,
 	 PROG_VERSION,
+	 "%Ga, %gc",
 	},
 	{"==", "eq.u", OP_EQ_U, false,
 	 ev_uinteger, ev_uinteger, ev_integer,
@@ -883,6 +891,7 @@ opcode_t pr_opcodes[] = {
 	{"~", "bitnot.f", OP_BITNOT_F, false,
 	 ev_float, ev_void, ev_float,
 	 PROG_VERSION,
+	 "%Ga, %gc",
 	},
 	{"^", "bitxor.i", OP_BITXOR_I, false,
 	 ev_integer, ev_integer, ev_integer,
@@ -891,6 +900,7 @@ opcode_t pr_opcodes[] = {
 	{"~", "bitnot.i", OP_BITNOT_I, false,
 	 ev_integer, ev_void, ev_integer,
 	 PROG_VERSION,
+	 "%Ga, %gc",
 	},
 	{"^", "bitxor.u", OP_BITXOR_U, false,
 	 ev_uinteger, ev_uinteger, ev_uinteger,
@@ -899,6 +909,7 @@ opcode_t pr_opcodes[] = {
 	{"~", "bitnot.u", OP_BITNOT_U, false,
 	 ev_uinteger, ev_void, ev_uinteger,
 	 PROG_VERSION,
+	 "%Ga, %gc",
 	},
 
 	{">=", "ge.p", OP_GE_P, false,