Changeset 597 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int19h

Timestamp:

Jul 11, 2018, 9:44:43 AM (6 years ago)

Author:

Tomi Tilli

Message:

Windows 95 CMOS hack now works with Award BIOSes.
Some small optimizations to INT 19h and INT 19h reset handlers.
Added menuitem to configurator for clearing BDA drive count.

Location:

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int19h

Files:

• BootSector.asm (modified) (1 diff)
• Int19hReset.asm (modified) (1 diff)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int19h/BootSector.asm

@@ -59 +59 @@
     jne     SHORT .FirstHardDiskSectorNotBootable
 .AlwaysBootFromFloppyDriveForBooterGames:
-    stc     ; Boot Sector loaded successfully
-    jmp     SHORT Int19h_JumpToBootSectorOrRomBoot
+    clc     ; Boot Sector loaded successfully
+    jmp     SHORT Int19h_JumpToBootSectorInESBXOrRomBoot
 
 .FirstHardDiskSectorNotBootable:

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int19h/Int19hReset.asm

@@ -38 +38 @@
     call    BootSector_LoadFirstSectorFromDriveDL
     jc      SHORT .Reboot
-
-    xor     ax, ax
-    mov     ds, ax
-%ifdef USE_386
-    mov     fs, ax
-    mov     gs, ax
-%endif
     cmp     WORD [bx+510], 0AA55h   ; Valid boot sector?
-    jne     SHORT .Reboot
-    push    es                      ; Zero
-    push    bx
-    retf
+    je      SHORT Int19h_JumpToBootSectorInESBXOrRomBootWithoutStackChange
 
     ; Do warm reset since boot from floppy drive failed