Changeset 148 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH24h_HSetBlocks.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/AH24h_HSetBlocks.asm (modified) (5 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH24h_HSetBlocks.asm

@@ -1 @@
-; File name     :   AH24h_HSetBlocks.asm
-; Project name  :   IDE BIOS
-; Created date  :   28.12.2009
-; Last update   :   14.1.2011
-; Author        :   Tomi Tilli,
-;               :   Krister Nordvall (optimizations)
+; Project name  :   XTIDE Universal BIOS
 ; Description   :   Int 13h function AH=24h, Set Multiple Blocks.
 
@@ -15 +10 @@
 ; AH24h_HandlerForSetMultipleBlocks
 ;   Parameters:
-;       AH:     Bios function 24h
+;       AL:     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 per Block (1, 2, 4, 8, 16, 32, 64 or 128)
-;       DL:     Drive number
-;   Parameters loaded by Int13h_Jump:
-;       DS:     RAMVARS segment
-;   Returns:
+;   Returns with INTPACK in SS:BP:
 ;       AH:     Int 13h return status
 ;       CF:     0 if succesfull, 1 if error
-;       IF:     1
-;   Corrupts registers:
-;       Flags
 ;--------------------------------------------------------------------
 ALIGN JUMP_ALIGN
 AH24h_HandlerForSetMultipleBlocks:
-    push    dx
-    push    cx
-    push    bx
-    push    ax
 %ifndef USE_186
     call    AH24h_SetBlockSize
-    jmp     Int13h_PopXRegsAndReturn
+    jmp     Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
 %else
-    push    Int13h_PopXRegsAndReturn
+    push    Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
     ; Fall through to AH24h_SetBlockSize
 %endif
@@ -48 +37 @@
 ;   Parameters:
 ;       AL:     Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128)
-;       DL:     Drive number
-;       DS:     RAMVARS segment
+;       DS:DI:  Ptr to DPT (in RAMVARS segment)
 ;   Returns:
-;       DS:DI:  Ptr to DPT
 ;       AH:     Int 13h return status
 ;       CF:     0 if succesfull, 1 if error
 ;   Corrupts registers:
-;       AL, BX, CX, DX, DI
+;       AL, BX, CX, DX
 ;--------------------------------------------------------------------
 ALIGN JUMP_ALIGN
@@ -61 +48 @@
     ; Select Master or Slave and wait until ready
     mov     bl, al                              ; Backup block size
-    call    FindDPT_ForDriveNumber              ; DS:DI now points to DPT
     call    HDrvSel_SelectDriveAndDisableIRQ    ; Select drive and wait until ready
-    jc      SHORT .Return                       ; Return if error
+    jc      SHORT .ReturnWithErrorCodeInAH      ; Return if error
 
     ; Output block size and command
@@ -80 +66 @@
 .DisableBlockMode:
     mov     BYTE [di+DPT.bSetBlock], 1          ; Disable block mode
-.Return:
+.ReturnWithErrorCodeInAH:
     ret