Changeset 148 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/Common/HDrvSel.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/Common/HDrvSel.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/Common/HDrvSel.asm

@@ -4 +4 @@
 ; Section containing code
 SECTION .text
+
+;--------------------------------------------------------------------
+; Selects Master or Slave drive and disables interrupts. Interrupts should
+; be disabled for commands that do not transfer data.
+; This function returns after drive is ready to accept commands.
+;
+; HDrvSel_SelectDriveAndDisableIRQ
+;   Parameters:
+;       DS:DI:  Ptr to DPT
+;   Returns:
+;       AH:     BIOS Error code
+;       CF:     0 if drive selected successfully
+;               1 if any error
+;   Corrupts registers:
+;       AL
+;--------------------------------------------------------------------
+ALIGN JUMP_ALIGN
+HDrvSel_SelectDriveAndDisableIRQ:
+    push    bx
+    mov     al, [di+DPT.bDrvCtrl]   ; Load Device Control Byte
+    or      al, FLG_IDE_CTRL_nIEN   ; Disable interrupts
+    call    HDrvSel_SelectDriveAndSetControlByte
+    pop     bx
+    ret
+
 
 ;--------------------------------------------------------------------
@@ -81 +106 @@
     out     dx, al                          ; Output Device Control byte
     ret
-
-
-;--------------------------------------------------------------------
-; Selects Master or Slave drive and disables interrupts. Interrupts should
-; be disabled for commands that do not transfer data.
-; This function returns after drive is ready to accept commands.
-;
-; HDrvSel_SelectDriveAndDisableIRQ
-;   Parameters:
-;       DS:DI:  Ptr to DPT
-;   Returns:
-;       AH:     BIOS Error code
-;       CF:     0 if drive selected successfully
-;               1 if any error
-;   Corrupts registers:
-;       AL
-;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
-HDrvSel_SelectDriveAndDisableIRQ:
-    push    bx
-    mov     al, [di+DPT.bDrvCtrl]   ; Load Device Control Byte
-    or      al, FLG_IDE_CTRL_nIEN   ; Disable interrupts
-    call    HDrvSel_SelectDriveAndSetControlByte
-    pop     bx
-    ret