diff --git a/src/machine/m_at_slot1.c b/src/machine/m_at_slot1.c
index 2f3edfd82..1ab48f7b4 100644
--- a/src/machine/m_at_slot1.c
+++ b/src/machine/m_at_slot1.c
@@ -204,8 +204,8 @@ machine_at_p2bls_init(const machine_t *model)
     pci_init(PCI_CONFIG_TYPE_1);
     pci_register_slot(0x00, PCI_CARD_NORTHBRIDGE, 0, 0, 0, 0);
     pci_register_slot(0x04, PCI_CARD_SOUTHBRIDGE, 1, 2, 3, 4);
-    pci_register_slot(0x06, PCI_CARD_NORMAL,      4, 1, 2, 3);
-    pci_register_slot(0x07, PCI_CARD_NORMAL,      3, 4, 1, 2);
+    pci_register_slot(0x06, PCI_CARD_NORMAL,      4, 1, 2, 3); /* SCSI */
+    pci_register_slot(0x07, PCI_CARD_NORMAL,      3, 4, 1, 2); /* LAN */
     pci_register_slot(0x0B, PCI_CARD_NORMAL,      2, 3, 4, 1);
     pci_register_slot(0x0C, PCI_CARD_NORMAL,      1, 2, 3, 4);
     pci_register_slot(0x09, PCI_CARD_NORMAL,      4, 1, 2, 3);