Changeset 262 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs/CreateDPT.asm

Timestamp:

Feb 24, 2012, 10:28:31 AM (12 years ago)

Author:

gregli@…

google:author:

gregli@hotmail.com

Message:

More optimizations. Merged RamVars_IsFunction/DriveHandledByThisBIOS in with FindDPT_ForDriveNumber, since they are often used together, making a returned NULL DI pointer indicate a foreign drive in many places. Revamped the iteration done in the handlers for int13/0dh and int13h/0h. Added serial specific print string during drive detection.

File:

• trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs/CreateDPT.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs/CreateDPT.asm

@@ -200 +200 @@
     call    Device_FinalizeDPT
 
+;----------------------------------------------------------------------
+; Update drive counts (hard and floppy)
+;---------------------------------------------------------------------- 
+        
 %ifdef MODULE_SERIAL_FLOPPY
 ;
@@ -223 +227 @@
 %endif
 
-    ; Fall to .StoreDriveNumberAndUpdateDriveCount
-
-;--------------------------------------------------------------------
-; .StoreDriveNumberAndUpdateDriveCount
-;   Parameters:
-;       DS:DI:  Ptr to Disk Parameter Table
-;       ES:SI:  Ptr to 512-byte ATA information read from the drive
-;       CS:BP:  Ptr to IDEVARS for the controller
-;       ES:     BDA Segment
-;   Returns:
-;       DL:     Drive number for new drive
-;       CF:     Always cleared
-;   Corrupts registers:
-;       Nothing
-;--------------------------------------------------------------------
-.StoreDriveNumberAndUpdateDriveCount:
-    mov     dl, [es:BDA.bHDCount]
-    or      dl, 80h                     ; Set bit 7 since hard disk
-
     inc     BYTE [RAMVARS.bDrvCnt]      ; Increment drive count to RAMVARS
-    inc     BYTE [es:BDA.bHDCount]      ; Increment drive count to BDA
-
-    cmp     BYTE [RAMVARS.bFirstDrv], 0 ; First drive set?
-    ja      SHORT .AllDone              ;  If so, return
-    mov     [RAMVARS.bFirstDrv], dl     ; Store first drive number
-
-.AllDone:
+        
+.AllDone:               
     clc
     ret