Changeset 77 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Libraries/keys.asm

Timestamp:

Jan 4, 2011, 10:53:15 PM (14 years ago)

Author:

krille_n_@…

google:author:

krille_n_@hotmail.com

Message:

Minor size optimizations plus a bug fix in print.asm in Print_IntSW (DI was left hanging on the stack if the parameter in AX was positive). Also a very minor speed optimization in keys.asm in Keys_Backspace.

File:

• trunk/XTIDE_Universal_BIOS/Src/Libraries/keys.asm (modified) (3 diffs)

trunk/XTIDE_Universal_BIOS/Src/Libraries/keys.asm

@@ -2 +2 @@
 ; Project name  :   Keyboard library
 ; Created date  :   17.11.2009
-; Last update   :   31.12.2009
-; Author        :   Tomi Tilli
+; Last update   :   4.1.2011
+; Author        :   Tomi Tilli,
+;               :   Krister Nordvall (optimizations)
 ; Description   :   ASM library to for keyboard related functions.      
 
@@ -311 +312 @@
 ALIGN JUMP_ALIGN
 Keys_Backspace:
-    push    dx
     test    si, si              ; At the beginning?
     jz      .Return             ;  If so, return
+    push    dx                  ; Save DX
     dec     si                  ; Decrement char counter
     dec     di                  ; Decrement offset to buffer
@@ -322 +323 @@
     mov     dl, BS              ; Back again
     PRINT_CHAR
+    pop     dx                  ; Restore DX
 ALIGN JUMP_ALIGN
 .Return:
-    pop     dx
-    ret
-%endif
+    ret
+%endif