--- qemu/roms/seabios/src/acpi.c	2018/04/24 17:36:48	1.1.1.1
+++ qemu/roms/seabios/src/acpi.c	2018/04/24 18:00:42	1.1.1.3
@@ -429,10 +429,12 @@ build_ssdt(void)
     // build processor scope header
     *(ssdt_ptr++) = 0x10; // ScopeOp
     if (cpu_length <= 0x3e) {
+        /* Handle 1-4 CPUs with one byte encoding */
         *(ssdt_ptr++) = cpu_length + 1;
     } else {
-        *(ssdt_ptr++) = 0x7F;
-        *(ssdt_ptr++) = (cpu_length + 2) >> 6;
+        /* Handle 5-314 CPUs with two byte encoding */
+        *(ssdt_ptr++) = 0x40 | ((cpu_length + 2) & 0xf);
+        *(ssdt_ptr++) = (cpu_length + 2) >> 4;
     }
     *(ssdt_ptr++) = '_'; // Name
     *(ssdt_ptr++) = 'P';
@@ -677,7 +679,7 @@ acpi_bios_init(void)
 }
 
 u32
-find_resume_vector()
+find_resume_vector(void)
 {
     dprintf(4, "rsdp=%p\n", RsdpAddr);
     if (!RsdpAddr || RsdpAddr->signature != RSDP_SIGNATURE)