diff --git a/src/machine/m_at_slot1.c b/src/machine/m_at_slot1.c
index 0cbca139c..7b62b4a81 100644
--- a/src/machine/m_at_slot1.c
+++ b/src/machine/m_at_slot1.c
@@ -790,7 +790,16 @@ static const device_config_t ga686_config[] = {
                 .files         = { "roms/machines/686bx/31nologo.bin", "" }
             },
             {
-                .name          = "Award Modular BIOS v4.51PG - Revision F2a",
+                .name          = "Award Modular BIOS v4.51PG - Revision F1 (Latest)",
+                .internal_name = "686bx",
+                .bios_type     = BIOS_NORMAL,
+                .files_no      = 1,
+                .local         = 0,
+                .size          = 262144,
+                .files         = { "roms/machines/686bx/6BX.F1", "" }
+            },
+            {
+                .name          = "Award Modular BIOS v4.51PG - Revision F2a (Beta)",
                 .internal_name = "686bx",
                 .bios_type     = BIOS_NORMAL,
                 .files_no      = 1,