Changeset 116 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/Common/HPIO.asm

Timestamp:

Feb 26, 2011, 11:55:06 PM (13 years ago)

Author:

krille_n_@…

google:author:

krille_n_@hotmail.com

Message:

Changes to all parts of the project:

• Removed a redundant macro (HPIO_NORMALIZE_PTR)
• Deleted XTIDE_Universal_BIOS/Inc/BiosData.inc since that was also redundant.
• Size optimization: Changed the LOAD_BDA_SEGMENT_TO macro to use the stack on 186+ processors (the old behaviour can still be used where needed).
• Made other minor size optimizations and cleanups to various functions, mostly in the Int13h handler.

File:

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

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

@@ -1 @@
-; Project name  :   IDE BIOS
+; Project name  :   XTIDE Universal BIOS
 ; Description   :   PIO transfer functions.
 
@@ -15 +15 @@
 
 ;--------------------------------------------------------------------
-; Normalizes far pointer to that offset overflows won't happen
-; when transferring data using PIO.
-;
-; HPIO_NORMALIZE_PTR
-;   Parameters:
-;       %1:%2:      Far pointer to normalize
-;       %3:         Scratch register
-;       %4:         Scratch register
-;   Returns:
-;       %1:%2:      Normalized far pointer
-;   Corrupts registers:
-;       %3, %4
-;--------------------------------------------------------------------
-%macro HPIO_NORMALIZE_PTR 4
-    mov     %4, %2              ; Copy offset to scratch reg
-    and     %2, BYTE 0Fh        ; Clear offset bits 15...4
-    eSHR_IM %4, 4               ; Divide offset by 16
-    mov     %3, %1              ; Copy segment to scratch reg
-    add     %3, %4              ; Add shifted offset to segment
-    mov     %1, %3              ; Set normalized segment
-%endmacro
-
-
-;--------------------------------------------------------------------
 ; Reads sectors from hard disk using PIO transfer mode.
 ;
@@ -110 +86 @@
     mov     [bp+PIOVARS.fnXfer], bx             ; Store offset to transfer function
     xchg    bx, ax
-    ; Fall to HPIO_NormalizePtr
-
-;--------------------------------------------------------------------
-; Initializes PIOVARS members.
-;
-; HPIO_InitializePIOVARS
+    ; Fall to HPIO_NormalizeDataPointer
+
+;--------------------------------------------------------------------
+; Normalizes far pointers so that offset overflows won't happen
+; when transferring data using PIO.
+;
+; HPIO_NormalizeDataPointer
 ;   Parameters:
 ;       ES:BX:  Ptr to source or destination data buffer
@@ -125 +102 @@
 ;ALIGN JUMP_ALIGN
 HPIO_NormalizeDataPointer:
-    HPIO_NORMALIZE_PTR  es, bx, ax, cx
+    NORMALIZE_FAR_POINTER es, bx, ax, cx
     ret