Changeset 521 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h

Timestamp:

Mar 10, 2013, 3:46:59 PM (12 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• Hopefully fixed problems with recent changes to AH=00h.
• Timeout error code is no longer displayed when trying to boot from floppy drive.

Location:

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h

Files:

• AH0h_HReset.asm (modified) (2 diffs)
• AH9h_HInit.asm (modified) (3 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH0h_HReset.asm

@@ -119 +119 @@
     jz      SHORT .ErrorCodeNotUsed
     mov     bl, [di+DPT.bIdevarsOffset]                 ; replace drive number with Idevars pointer for cmp with dl
-.ErrorCodeNotUsed:
-
-    mov     si, ControllerResetForDPTinDSDI
-    call    .CallSIforEveryController                   ; Reset all drives to power on settings
-    mov     si, ControllerInitForMasterOrSingleDPTinDSDI
-    ; Fall to .CallSIforEveryController                 ; Initialize all controllers (Master and Slave drives)
-
-.CallSIforEveryController:                              ; BH will be garbage on exit if this entry point is used,
+.ErrorCodeNotUsed:                                      ; BH will be garbage on exit if this entry point is used,
                                                         ; but reset of all drives will still happen
-
     mov     dl, ROMVARS.ideVars0                        ; starting Idevars offset
 
@@ -139 +131 @@
 
 .loop:
-    push    si
-    call    FindDPT_ForIdevarsOffsetInDL                ; look for the first drive on this controller, if any
-    pop     si
-    jc      SHORT .notFound
+    call    FindDPT_MasterOrSingleForIdevarsOffsetInDL
+    jc      SHORT .ControllerNotAvailable
 
-    push    bx
+    ; Reset controller (both Master and Slave Drive). We ignore error codes
+    ; here since initialization is the one that matters.
     push    cx
     push    dx
-    call    si                                          ; Reset Master AND Slave or initialize Master OR Slave drive
+    push    bx
+%ifdef MODULE_IRQ
+    call    Interrupts_UnmaskInterruptControllerForDriveInDSDI
+%endif
+    call    Device_ResetMasterAndSlaveController
+%ifdef MODULE_ADVANCED_ATA
+    call    AdvAtaInit_InitializeControllerForDPTinDSDI
+%endif
+    pop     bx
     pop     dx
+
+    ; Initialize Master Drive
+    call    AH9h_InitializeDriveForUse                  ; Initialize Master drive
+    call    BackupErrorCodeFromTheRequestedDriveToBH
+
+    ; Initialize Slave Drive
+    call    FindDPT_SlaveForIdevarsOffsetInDL
+    jc      SHORT .SlaveDriveNotAvailable
+    call    AH9h_InitializeDriveForUse
+    ; Here we have a small problem. Since DL now has offset to IDEVARS, it will be the same
+    ; for both Master and Slave Drive. We simply ignore error from slave drive reset since most
+    ; systems do not have slave drives at all and it is unlikely that AH=00h would be called for
+    ; specific drive anyway. AH=Dh is for that.
+
+.SlaveDriveNotAvailable:
     pop     cx
-    pop     bx
-    call    BackupErrorCodeFromTheRequestedDriveToBH    ; save error code if same controller as drive from entry
-
-.notFound:
+.ControllerNotAvailable:
     add     dl, IDEVARS_size                            ; move Idevars pointer forward
     loop    .loop
     ret
-
-
-;--------------------------------------------------------------------
-; ControllerResetForDPTinDSDI
-;   Parameters:
-;       DS:DI:  Ptr to DPT for drive to reset (resets both Master and Slave drive)
-;       SS:BP:  Ptr to IDEPACK
-;   Returns:
-;       AH:     Int 13h return status
-;   Corrupts registers:
-;       AL, BX, CX, DX
-;--------------------------------------------------------------------
-ControllerResetForDPTinDSDI:
-%ifdef MODULE_IRQ
-    call    Interrupts_UnmaskInterruptControllerForDriveInDSDI
-%endif
-%ifdef MODULE_ADVANCED_ATA
-    call    Device_ResetMasterAndSlaveController
-    jmp     AdvAtaInit_InitializeControllerForDPTinDSDI
-%else
-    jmp     Device_ResetMasterAndSlaveController
-%endif
-
-
-;--------------------------------------------------------------------
-; ControllerInitForMasterOrSingleDPTinDSDI
-;   Parameters:
-;       DS:DI:  Ptr to DPT for Master or Single Drive (initializes both Master and Slave drive)
-;       SS:BP:  Ptr to IDEPACK
-;   Returns:
-;       AH:     Int 13h return status
-;   Corrupts registers:
-;       AL, BX, CX, DX
-;--------------------------------------------------------------------
-ControllerInitForMasterOrSingleDPTinDSDI:
-    call    AH9h_InitializeDriveForUse          ; Init Master or Single drive
-    push    ax                                  ; Store error code
-
-    eMOVZX  ax, BYTE [di+DPT.bIdevarsOffset]    ; Clear AH
-    add     di, BYTE LARGEST_DPT_SIZE           ; Slave drive or next controller
-    cmp     [di+DPT.bIdevarsOffset], al
-    jne     SHORT .NoSlaveDrivePresent
-
-    call    AH9h_InitializeDriveForUse          ; Init Slave drive
-.NoSlaveDrivePresent:
-    pop     bx
-    MAX_U   ah, bh                              ; Return error code from either drive
-    ret

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH9h_HInit.asm

@@ -73 +73 @@
 ;       CF:     0 if successful, 1 if error
 ;   Corrupts registers:
-;       AL, BX, CX, DX
+;       AL, CX
 ;--------------------------------------------------------------------
 AH9h_InitializeDriveForUse:
@@ -93 +93 @@
     push    es
     push    si
+    push    dx
+    push    bx
 
 
@@ -232 +234 @@
 %endif
 
+    pop     bx
+    pop     dx
     pop     si
     pop     es