diff --git a/drivers/obio.c b/drivers/obio.c
index c3ad723..bc3f887 100644
--- a/drivers/obio.c
+++ b/drivers/obio.c
@@ -738,6 +738,46 @@ static const struct machdef sun4m_defs[] = {
         .mid_offset = 0,
         .initfn = dummy_mach_init,
     },
+    {
+        .machine_id = 33,
+        .banner_name = "SPARCstation Voyager",
+        .model = "SUNW,501-2581",
+        .name = "SUNW,SPARCstation-Voyager",
+        .mid_offset = 0,
+        .initfn = dummy_mach_init,
+    },
+    {
+        .machine_id = 34,
+        .banner_name = "SPARCstation LX",
+        .model = "SUNW,501-2031",
+        .name = "SUNW,SPARCstation-LX",
+        .mid_offset = 0,
+        .initfn = dummy_mach_init,
+    },
+    {
+        .machine_id = 35,
+        .banner_name = "SPARCstation 4",
+        .model = "SUNW,501-2572",
+        .name = "SUNW,SPARCstation-4",
+        .mid_offset = 0,
+        .initfn = dummy_mach_init,
+    },
+    {
+        .machine_id = 36,
+        .banner_name = "SPARCstation Classic",
+        .model = "SUNW,501-2326",
+        .name = "SUNW,SPARCstation-Classic",
+        .mid_offset = 0,
+        .initfn = dummy_mach_init,
+    },
+    {
+        .machine_id = 37,
+        .banner_name = "Tadpole S3 GX",
+        .model = "S3",
+        .name = "Tadpole_S3GX",
+        .mid_offset = 0,
+        .initfn = dummy_mach_init,
+    },
     {
         .machine_id = 64,
         .banner_name = "SPARCstation 10 (1 X 390Z55)",