Changeset 559 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers

Timestamp:

Jun 24, 2013, 2:22:36 PM (12 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• All XT builds now default to 1 controller.
• Very late initialization handler now waits read command until installing and calling 19h.

File:

• trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13hBiosInit.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13hBiosInit.asm

@@ -26 +26 @@
 
 Int13hBiosInit_Handler:
+    ; Ignore all but read command (assumed to read boot sector)
+    cmp     ah, READ_SECTORS_INTO_MEMORY
+    jne     SHORT .MainBiosStillInInitializationMode
+
     LOAD_BDA_SEGMENT_TO ds, ax
 
@@ -33 +37 @@
     mov     [BIOS_BOOT_LOADER_INTERRUPT_19h*4+2], cs
     int     BIOS_BOOT_LOADER_INTERRUPT_19h  ; Does not return
+
+    ; Main BIOS might reset floppy drives etc. so let's wait longer
+    ; before installing our INT 19h handler.
+.MainBiosStillInInitializationMode:
+    int     TEMPORARY_VECTOR_FOR_SYSTEM_INT13h
+    retf    2