Changeset 39109 in vbox for trunk/src/VBox/Devices/PC

Timestamp:

Oct 25, 2011 12:24:14 PM (13 years ago)

Author:

vboxsync

Message:

BIOS: Leave high interrupt vectors zeroed to indicate they are unused.

Location:

trunk/src/VBox/Devices/PC

Files:

• BIOS-new/orgs.asm (modified) (1 diff)
• BIOS/rombios.c (modified) (1 diff)

trunk/src/VBox/Devices/PC/BIOS-new/orgs.asm

@@ -309 +309 @@
                 xor     bx, bx
                 mov     ds, bx
-                mov     cx, 100h        ; 256 interrupts
+                mov     cx, 78h         ; leave the rest as zeros
                 mov     ax, dummy_iret
                 mov     dx, BIOSSEG

trunk/src/VBox/Devices/PC/BIOS/rombios.c

@@ -11536 +11536 @@
   ;; set all interrupts to default handler
   xor  bx, bx         ;; offset index
-  mov  cx, #0x0100    ;; counter (256 interrupts)
+  mov  cx, #0x0078    ;; leave the rest as zeros
   mov  ax, #dummy_iret_handler
   mov  dx, #0xF000