Changeset 556 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Initialization/Initialize.asm

Timestamp:

Jun 16, 2013, 4:23:00 PM (11 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• Removed Windows 98 fix since it broke floppy drive translation.
• Removed very late initialization from AT builds since it slowed down Windows 98 for unknown reason.

File:

• trunk/XTIDE_Universal_BIOS/Src/Initialization/Initialize.asm (modified) (3 diffs)

trunk/XTIDE_Universal_BIOS/Src/Initialization/Initialize.asm

@@ -37 +37 @@
     push    ds
 
-%ifndef USE_186
-    push    ax
-    LOAD_BDA_SEGMENT_TO ds, ax
-%else
+%ifdef USE_AT
     push    BYTE 0
     pop     ds
+%else
+    push    ax                          ; We use AX to install very late init handler
+    LOAD_BDA_SEGMENT_TO ds, ax
 %endif
 
@@ -53 +53 @@
     mov     [BIOS_BOOT_LOADER_INTERRUPT_19h*4+2], cs
 
+    ; Very late initialization for XT builds only
+%ifndef USE_AT
+    push    es
     ; Install special INT 13h hander that initializes XTIDE Universal BIOS
     ; when our INT 19h is not called
@@ -60 +63 @@
     mov     WORD [BIOS_DISK_INTERRUPT_13h*4], Int13hBiosInit_Handler
     mov     [BIOS_DISK_INTERRUPT_13h*4+2], cs
+    pop     es
+%endif
 
 .SkipRomInitialization:
-%ifndef USE_186
+%ifndef USE_AT
     pop     ax
 %endif