Changeset 97 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Initialization/Initialize.asm

Timestamp:

Jan 30, 2011, 6:43:08 PM (14 years ago)

Author:

Tomi Tilli

google:author:

aitotat

Message:

Changes to XTIDE Universal BIOS:

• Inlined some initialization functions.
• Removed alignment bytes from some initialization functions.
• Removed creation of compatible DPTs.

File:

• trunk/XTIDE_Universal_BIOS/Src/Initialization/Initialize.asm (modified) (4 diffs)

trunk/XTIDE_Universal_BIOS/Src/Initialization/Initialize.asm

@@ -17 +17 @@
 ;       Nothing
 ;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
 Initialize_FromMainBiosRomSearch:
     pushf
@@ -53 +52 @@
 ;       Nothing
 ;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
 Initialize_ShouldSkip:
     sti                                     ; Enable interrupts
@@ -67 +65 @@
 ;       ES:     BDA Segment
 ;   Returns:
-;       Nothing
+;       DS:     RAMVARS segment
 ;   Corrupts registers:
-;       All, including segments
+;       All
 ;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
 Initialize_AndDetectDrives:
     call    DetectPrint_RomFoundAtSegment
     call    RamVars_Initialize
-    call    RamVars_GetSegmentToDS
     call    Interrupts_InitializeInterruptVectors
     call    DetectDrives_FromAllIDEControllers
-    call    CompatibleDPT_CreateForDrives80hAnd81h
+    ; Fall to .StoreDptPointersToBDA
+
+;--------------------------------------------------------------------
+; .StoreDptPointersToBDA
+;   Parameters:
+;       DS:     RAMVARS segment
+;       ES:     BDA and interrupt vector segment (zero)
+;   Returns:
+;       Nothing
+;   Corrupts registers:
+;       DX, DI
+;--------------------------------------------------------------------
+.StoreDptPointersToBDA:
+    mov     dl, 80h
+    call    FindDPT_ForDriveNumber  ; DPT to DS:DI
+    jnc     SHORT .FindForDrive81h  ; Store nothing if not our drive
+    mov     [es:INTV_HD0DPT*4], di
+    mov     [es:INTV_HD0DPT*4+2], ds
+.FindForDrive81h:
+    inc     dx
+    call    FindDPT_ForDriveNumber
+    jnc     SHORT .ResetDetectedDrives
+    mov     [es:INTV_HD1DPT*4], di
+    mov     [es:INTV_HD1DPT*4+2], ds
     ; Fall to .ResetDetectedDrives
 
 ;--------------------------------------------------------------------
-; Resets all hard disks.
-;
-; Initialize_ResetDetectedDrives
+; .ResetDetectedDrives
 ;   Parameters:
 ;       DS:     RAMVARS segment
@@ -92 +109 @@
 ;       AX, BX, CX, DX, DI
 ;--------------------------------------------------------------------
-;ALIGN JUMP_ALIGN
 .ResetDetectedDrives:
     jmp     AH0h_ResetHardDisksHandledByOurBIOS