Changeset 148 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH1h_HStatus.asm

Timestamp:

Mar 19, 2011, 8:09:41 PM (14 years ago)

Author:

Tomi Tilli

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/AH1h_HStatus.asm (modified) (1 diff)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH1h_HStatus.asm

@@ -10 +10 @@
 ; AH1h_HandlerForReadDiskStatus
 ;   Parameters:
-;       AH:     Bios function 1h
-;       DL:     Drive number (8xh)
-;   Parameters loaded by Int13h_Jump:
-;       DS:     RAMVARS segment
-;   Returns:
+;       DL:     Translated Drive number
+;       DS:DI:  Ptr to DPT (in RAMVARS segment)
+;       SS:BP:  Ptr to INTPACK
+;   Returns with INTPACK in SS:BP:
 ;       AH:     Int 13h floppy return status
 ;       CF:     0 if AH = RET_HD_SUCCESS, 1 otherwise (error)
-;       IF:     1
-;   Corrupts registers:
-;       Flags
 ;--------------------------------------------------------------------
 ALIGN JUMP_ALIGN
 AH1h_HandlerForReadDiskStatus:
-    push    ds
-
-    LOAD_BDA_SEGMENT_TO ds, di
-    mov     ah, [BDA.bHDLastSt]     ; Last error to AH
-    cmp     ah, 1                   ; Set CF if error code is zero
-    cmc                             ; Invert CF
-
-    pop     ds
-    jmp     Int13h_PopDiDsAndReturn
+    LOAD_BDA_SEGMENT_TO ds, ax, !
+    xchg    ah, [BDA.bHDLastSt]     ; Load and clear last error
+    call    HError_SetErrorCodeToIntpackInSSBPfromAH
+    jmp     Int13h_ReturnFromHandlerWithoutStoringErrorCode