diff --git a/src/devices/system.c b/src/devices/system.c
index 5a44c5e..4a61f0a 100644
--- a/src/devices/system.c
+++ b/src/devices/system.c
@@ -94,6 +94,13 @@ system_version(char *name, char *date)
 	return 0;
 }
 
+int
+system_boot(Uxn *u, Uint8 *ram)
+{
+	u->ram = ram;
+	return 1;
+}
+
 /* IO */
 
 void
@@ -103,13 +110,6 @@ system_deo(Uxn *u, Uint8 *d, Uint8 port)
 	case 0x3:
 		system_cmd(u->ram, PEEK2(d + 2));
 		break;
-	case 0x5:
-		if(PEEK2(d + 4)) {
-			Uxn friend;
-			uxn_boot(&friend, u->ram);
-			uxn_eval(&friend, PEEK2(d + 4));
-		}
-		break;
 	case 0xe:
 		system_inspect(u);
 		break;
diff --git a/src/devices/system.h b/src/devices/system.h
index 0ec1e33..1772906 100644
--- a/src/devices/system.h
+++ b/src/devices/system.h
@@ -20,4 +20,5 @@ int system_version(char *emulator, char *date);
 int system_load(Uxn *u, char *filename);
 void system_inspect(Uxn *u);
 int system_error(char *msg, const char *err);
+int system_boot(Uxn *u, Uint8 *ram);
 void system_deo(Uxn *u, Uint8 *d, Uint8 port);
diff --git a/src/uxn.c b/src/uxn.c
index 068cc78..d367181 100644
--- a/src/uxn.c
+++ b/src/uxn.c
@@ -117,14 +117,3 @@ uxn_eval(Uxn *u, Uint16 pc)
 		}
 	}
 }
-
-int
-uxn_boot(Uxn *u, Uint8 *ram)
-{
-	Uint32 i;
-	char *cptr = (char *)u;
-	for(i = 0; i < sizeof(*u); i++)
-		cptr[i] = 0;
-	u->ram = ram;
-	return 1;
-}
diff --git a/src/uxn.h b/src/uxn.h
index 8cab5f1..896bb53 100644
--- a/src/uxn.h
+++ b/src/uxn.h
@@ -46,5 +46,4 @@ extern Uint16 dev_vers[0x10], dei_mask[0x10], deo_mask[0x10];
 
 /* built-ins */
 
-int uxn_boot(Uxn *u, Uint8 *ram);
 int uxn_eval(Uxn *u, Uint16 pc);
diff --git a/src/uxncli.c b/src/uxncli.c
index d792062..ada7f60 100644
--- a/src/uxncli.c
+++ b/src/uxncli.c
@@ -58,7 +58,7 @@ main(int argc, char **argv)
 	if(argv[i][0] == '-' && argv[i][1] == 'v')
 		return system_version("Uxncli - Console Varvara Emulator", "9 Aug 2023");
 	/* Continue.. */
-	if(!uxn_boot(&u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8))))
+	if(!system_boot(&u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8))))
 		return system_error("Boot", "Failed");
 	/* Load rom */
 	if(!system_load(&u, argv[i++]))
diff --git a/src/uxnemu.c b/src/uxnemu.c
index 65fbc6e..9b02d8c 100644
--- a/src/uxnemu.c
+++ b/src/uxnemu.c
@@ -258,7 +258,7 @@ static int
 emu_start(Uxn *u, char *rom, int queue)
 {
 	free(u->ram);
-	if(!uxn_boot(u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8))))
+	if(!system_boot(u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8))))
 		return system_error("Boot", "Failed to start uxn.");
 	if(!system_load(u, rom))
 		return system_error("Boot", "Failed to load rom.");