diff --git a/src/machine/m_at_socket370.c b/src/machine/m_at_socket370.c
index 871b3cc6b..1c33f6e4c 100644
--- a/src/machine/m_at_socket370.c
+++ b/src/machine/m_at_socket370.c
@@ -41,6 +41,41 @@
 #include "cpu.h"
 #include <86box/machine.h>
 
+#if defined(DEV_BRANCH) && defined(NO_SIO)
+int
+machine_at_s370slm_init(const machine_t *model)
+{
+    int ret;
+
+    ret = bios_load_linear(L"roms/machines/s370slm/3LM1202.rom",
+			   0x000c0000, 262144, 0);
+
+    if (bios_only || !ret)
+	return ret;
+
+    machine_at_common_init_ex(model, 2);
+
+    pci_init(PCI_CONFIG_TYPE_1);
+    pci_register_slot(0x00, PCI_CARD_NORTHBRIDGE, 0, 0, 0, 0);
+    pci_register_slot(0x07, PCI_CARD_SOUTHBRIDGE, 1, 2, 3, 4);
+    pci_register_slot(0x0F, PCI_CARD_NORMAL, 1, 2, 3, 4);
+    pci_register_slot(0x10, PCI_CARD_NORMAL, 2, 3, 4, 1);
+    pci_register_slot(0x12, PCI_CARD_NORMAL, 3, 4, 1, 2);
+    pci_register_slot(0x14, PCI_CARD_NORMAL, 4, 1, 2, 3);
+    pci_register_slot(0x0E, PCI_CARD_NORMAL, 1, 2, 3, 4);
+    pci_register_slot(0x01, PCI_CARD_NORMAL, 1, 2, 3, 4);
+    pci_register_slot(0x0D, PCI_CARD_NORMAL, 1, 2, 3, 4);
+    device_add(&i440bx_device);
+    device_add(&piix4e_device);
+    device_add(&w83977tf_device);
+    device_add(&keyboard_ps2_ami_pci_device);
+    device_add(&intel_flash_bxt_device);
+    spd_register(SPD_TYPE_SDRAM, 0xF, 256);
+
+    return ret;
+}
+#endif
+
 int
 machine_at_cubx_init(const machine_t *model)
 {