diff --git a/bios/rombios32.c b/bios/rombios32.c
index 77e71ac..af18390 100755
--- a/bios/rombios32.c
+++ b/bios/rombios32.c
@@ -983,7 +983,7 @@ #endif
     putstr(&q, "ISA   ");
 
     /* ioapic */
-    ioapic_id = MAX_CPUS;
+    ioapic_id = smp_cpus;
     putb(&q, 2); /* entry type = I/O APIC */
     putb(&q, ioapic_id); /* apic ID */
     putb(&q, 0x11); /* I/O APIC version number */
@@ -1427,7 +1427,7 @@ #endif
         io_apic = (void *)apic;
         io_apic->type = APIC_IO;
         io_apic->length = sizeof(*io_apic);
-        io_apic->io_apic_id = MAX_CPUS;
+        io_apic->io_apic_id = smp_cpus;
         io_apic->address = cpu_to_le32(0xfec00000);
         io_apic->interrupt = cpu_to_le32(0);
 
diff --git a/qemu/pc-bios/bios.bin b/qemu/pc-bios/bios.bin
index 64b7abb..3a75ff5 100644
Binary files a/qemu/pc-bios/bios.bin and b/qemu/pc-bios/bios.bin differ