Changeset 48195 in vbox for trunk/src/VBox/Devices

Timestamp:

Aug 30, 2013 2:49:51 PM (11 years ago)

Author:

vboxsync

Message:

BIOS: Shorter offsets, reorder timer tick processing.

File:

• trunk/src/VBox/Devices/PC/BIOS/orgs.asm (modified) (2 diffs)

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

@@ -1718 +1718 @@
                 push    eax
                 push    ds
-                xor     ax, ax
+                push    dx
+                mov     ax, 40h
                 mov     ds, ax
 
-                ;; time to turn off floppy drive motor(s)?
-                mov     al, ds:[440h]
-                or      al, al
-                jz      int08_floppy_off
-                dec     al
-                mov     ds:[440h], al
-                jnz     int08_floppy_off
-                ;; turn motor(s) off
-                push    dx
-                mov     dx, 03F2h
-                in      al, dx
-                and     al, 0CFh
-                out     dx, al
-                pop     dx
-
-int08_floppy_off:
-                mov     eax, ds:[46Ch]  ; get ticks dword
+                mov     eax, ds:[6Ch]   ; get ticks dword
                 inc     eax
 
@@ -1745 +1730 @@
                 ;; there has been a midnight rollover
                 xor     eax, eax
-                inc     byte ptr ds:[470h]      ; increment rollover flag
+                inc     byte ptr ds:[70h]       ; increment rollover flag
 
 int08_store_ticks:
-                mov     ds:[46Ch], eax
+                mov     ds:[6Ch], eax
+
+                ;; time to turn off floppy drive motor(s)?
+                mov     al, ds:[40h]
+                or      al, al
+                jz      int08_floppy_off
+                dec     al
+                mov     ds:[40h], al
+                jnz     int08_floppy_off
+                ;; turn motor(s) off
+                mov     dx, 03F2h
+                in      al, dx
+                and     al, 0CFh
+                out     dx, al
+int08_floppy_off:
+
                 int     1Ch             ; call the user timer handler
+
                 cli
                 call    eoi_master_pic
+                pop     dx
                 pop     ds
                 pop     eax