Changeset 117 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Boot/BootVars.asm

Timestamp:

Feb 28, 2011, 12:16:21 PM (14 years ago)

Author:

krille_n_@…

google:author:

krille_n_@hotmail.com

Message:

Changes to the XTIDE Universal BIOS:

• Bugfix: The stack swapping in BootVars_SwitchBackToPostStack wasn't really an atomic operation anymore (on 186 and 286 CPUs) so I reverted the change I did in the previous revision.
• A very small size optimization in AH15h_HSize.asm

File:

• trunk/XTIDE_Universal_BIOS/Src/Boot/BootVars.asm (modified) (1 diff)

trunk/XTIDE_Universal_BIOS/Src/Boot/BootVars.asm

@@ -74 +74 @@
 BootVars_SwitchBackToPostStack:
     pop     ax                          ; Pop return address
-%ifndef USE_186
+%ifndef USE_386
     cli                                 ; Disable interrupts
-%endif
     LOAD_BDA_SEGMENT_TO ss, sp
-%ifndef USE_386
     mov     sp, [ss:BOOTVARS.dwPostStack]
     mov     ss, [ss:BOOTVARS.dwPostStack+2]
+    sti                                 ; Enable interrupts
 %else
+    LOAD_BDA_SEGMENT_TO ss, sp
     lss     sp, [ss:BOOTVARS.dwPostStack]
 %endif
-%ifndef USE_186
-    sti                                 ; Enable interrupts
-%endif
     jmp     ax