Changeset 116 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH1h_HStatus.asm

Timestamp:

Feb 26, 2011, 11:55:06 PM (14 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/AH1h_HStatus.asm (modified) (2 diffs)

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

@@ -1 @@
-; File name     :   AH1h_HStatus.asm
-; Project name  :   IDE BIOS
-; Created date  :   27.9.2007
-; Last update   :   24.8.2010
-; Author        :   Tomi Tilli
+; Project name  :   XTIDE Universal BIOS
 ; Description   :   Int 13h function AH=1h, Read Disk Status.
 
@@ -30 +26 @@
 
     LOAD_BDA_SEGMENT_TO ds, di
-    xor     ah, ah                  ; Zero AH
-    cmp     ah, [BDA.bHDLastSt]     ; Set CF if error code is non-zero
     mov     ah, [BDA.bHDLastSt]     ; Last error to AH
+    cmp     ah, 1                   ; Set CF if error code is zero
+    cmc                             ; Invert CF
 
     pop     ds