Changeset 181 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Initialization/Interrupts.asm

Timestamp:

Nov 13, 2011, 3:38:40 PM (12 years ago)

Author:

krille_n_@…

google:author:

krille_n_@hotmail.com

Message:

Changes to all parts of the project:

• Size optimizations.
• Added a define (EXCLUDE_FROM_XTIDECFG) to exclude unused library code from XTIDECFG.
• Tried to minimize time spent with interrupts disabled.
• Some minor attempts to improve speed (reordering instructions etc).
• Tried to improve readability, did some cleanup and fixed some errors in comments.

File:

• trunk/XTIDE_Universal_BIOS/Src/Initialization/Interrupts.asm (modified) (1 diff)

trunk/XTIDE_Universal_BIOS/Src/Initialization/Interrupts.asm

@@ -29 +29 @@
 ;--------------------------------------------------------------------
 .InitializeInt13hAnd40h:
+    mov     ax, [es:BIOS_DISK_INTERRUPT_13h*4+2]; Load old INT 13h segment
+    mov     [RAMVARS.fpOldI13h+2], ax           ; Store old INT 13h segment
+    xchg    dx, ax
     mov     ax, [es:BIOS_DISK_INTERRUPT_13h*4]  ; Load old INT 13h offset
-    mov     dx, [es:BIOS_DISK_INTERRUPT_13h*4+2]; Load old INT 13h segment
     mov     [RAMVARS.fpOldI13h], ax             ; Store old INT 13h offset
-    mov     [RAMVARS.fpOldI13h+2], dx           ; Store old INT 13h segment
+
     mov     bx, BIOS_DISK_INTERRUPT_13h         ; INT 13h interrupt vector offset
     mov     si, Int13h_DiskFunctionsHandler     ; Interrupt handler offset