Changeset 148 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH4h_HVerify.asm

Timestamp:

Mar 19, 2011, 8:09:41 PM (13 years ago)

Author:

aitotat

google:author:

aitotat

Message:

Changes to XTIDE Universal BIOS:

• INT 13h optimizations to save almost 100 bytes.

File:

• trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH4h_HVerify.asm (modified) (4 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH4h_HVerify.asm

@@ -1 @@
-; File name     :   AH4h_HVerify.asm
-; Project name  :   IDE BIOS
-; Created date  :   13.10.2007
-; Last update   :   14.1.2011
-; Author        :   Tomi Tilli,
-;               :   Krister Nordvall (optimizations)
+; Project name  :   XTIDE Universal BIOS
 ; Description   :   Int 13h function AH=4h, Verify Disk Sectors.
 
@@ -15 +10 @@
 ; AH4h_HandlerForVerifyDiskSectors
 ;   Parameters:
-;       AH:     Bios function 4h
+;       AL, CX, DH: Same as in INTPACK
+;       DL:     Translated Drive number
+;       DS:DI:  Ptr to DPT (in RAMVARS segment)
+;       SS:BP:  Ptr to INTPACK
+;   Parameters on INTPACK in SS:BP:
 ;       AL:     Number of sectors to verify
 ;       CH:     Cylinder number, bits 7...0
@@ -21 +20 @@
 ;               Bits 5...0: Starting sector number (1...63)
 ;       DH:     Starting head number (0...255)
-;       DL:     Drive number
-;       ES:BX:  Pointer to source data (not used)
-;   Parameters loaded by Int13h_Jump:
-;       DS:     RAMVARS segment
-;   Returns:
+;   Returns with INTPACK in SS:BP:
 ;       AH:     Int 13h/40h floppy return status
 ;       CF:     0 if successfull, 1 if error
-;       IF:     1
-;   Corrupts registers:
-;       Flags
 ;--------------------------------------------------------------------
 ALIGN JUMP_ALIGN
@@ -36 +28 @@
     test    al, al                      ; Invalid sector count?
     jz      SHORT AH2h_ZeroCntErr       ;  If so, return with error
-    push    dx
-    push    cx
-    push    bx
-    push    ax
-%ifndef USE_186
-    call    AH4h_VerifySectors
-    jmp     Int13h_PopXRegsAndReturn
-%else
-    push    Int13h_PopXRegsAndReturn
-    ; Fall through to AH4h_VerifySectors
-%endif
 
-
-;--------------------------------------------------------------------
-; Verifies hard disk sectors.
-;
-; AH4h_VerifySectors
-;   Parameters:
-;       AL:     Number of sectors to verify
-;       CH:     Cylinder number, bits 7...0
-;       CL:     Bits 7...6: Cylinder number bits 9 and 8
-;               Bits 5...0: Starting sector number (1...63)
-;       DH:     Starting head number (0...255)
-;       DL:     Drive number
-;       DS:     RAMVARS segment
-;   Returns:
-;       DS:DI:  Ptr to DPT
-;       AH:     Int 13h/40h floppy return status
-;       CF:     0 if successfull, 1 if error
-;   Corrupts registers:
-;       AL, BX, CX, DX
-;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
-AH4h_VerifySectors:
-    call    FindDPT_ForDriveNumber      ; DS:DI now points to DPT
     mov     ah, HCMD_VERIFY_SECT        ; Load command to AH
     call    HCommand_OutputCountAndLCHSandCommand
-    jc      SHORT .Return               ; Return if error
+    jc      SHORT .ReturnWithErrorCodeInAH
     mov     bx, di                      ; DS:BX now points to DPT
-    jmp     HStatus_WaitIrqOrRdy        ; Wait for IRQ or RDY
-.Return:
-    ret
+    call    HStatus_WaitIrqOrRdy        ; Wait for IRQ or RDY
+.ReturnWithErrorCodeInAH:
+    jmp     Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH