Changeset 552 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS

Timestamp:

Jun 7, 2013, 5:05:48 PM (11 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• XTIDE Universal BIOS can now be initialized if non-standard main BIOS does not call INT 19h or if INT 19h handler is replaced by some other BIOS.

Location:

trunk/XTIDE_Universal_BIOS/Src

Files:

• Handlers/Int13hBiosInit.asm (added)
• Initialization/Initialize.asm (modified) (1 diff)
• Main.asm (modified) (1 diff)

trunk/XTIDE_Universal_BIOS/Src/Initialization/Initialize.asm

@@ -52 +52 @@
     mov     WORD [BIOS_BOOT_LOADER_INTERRUPT_19h*4], Int19h_BootLoaderHandler
     mov     [BIOS_BOOT_LOADER_INTERRUPT_19h*4+2], cs
-    ;mov        WORD [BIOS_BOOT_FAILURE_INTERRUPT_18h*4], Int19h_BootLoaderHandler
-    ;mov        [BIOS_BOOT_FAILURE_INTERRUPT_18h*4+2], cs
+
+    ; Install special INT 13h hander that initialized XTIDE Universal BIOS
+    ; when our INT 19h is not called
+    les     ax, [BIOS_DISK_INTERRUPT_13h*4] ; Load system INT 13h handler
+    mov     [TEMPORARY_VECTOR_FOR_SYSTEM_INT13h*4], ax
+    mov     [TEMPORARY_VECTOR_FOR_SYSTEM_INT13h*4+2], es
+    mov     WORD [BIOS_DISK_INTERRUPT_13h*4], Int13hBiosInit_Handler
+    mov     [BIOS_DISK_INTERRUPT_13h*4+2], cs
 
 .SkipRomInitialization:

trunk/XTIDE_Universal_BIOS/Src/Main.asm

@@ -257 +257 @@
 
     ; INT 13h Hard Disk BIOS functions
+    %include "Int13hBiosInit.asm"
     %include "Int13h.asm"           ; For Int 13h, Disk functions
     %include "AH0h_HReset.asm"