Changeset 207 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS

Timestamp:

Jan 7, 2012, 7:57:57 PM (13 years ago)

Author:

gregli@…

google:author:

gregli@hotmail.com

Message:

Added buffer pointer denormalization check within the serial port code and reused the last portion of the NormalizeESSI and NormalizeESDI routines to save memory.

File:

• trunk/XTIDE_Universal_BIOS/Src/Device/Serial/SerialCommand.asm (modified) (5 diffs)

trunk/XTIDE_Universal_BIOS/Src/Device/Serial/SerialCommand.asm

@@ -177 +177 @@
         dec     dx
 
+;
+; Start off with a normalized buffer pointer
+; 
+        call    Registers_NormalizeESDI
+
 ;----------------------------------------------------------------------
 ;
@@ -183 +188 @@
 ; Sends first six bytes of IDEREGS_AND_INTPACK as the command
 ;
-        call    Registers_NormalizeESDI
-
         push    es              ; save off real buffer location
         push    di
@@ -323 +326 @@
         jnz     SerialCommand_OutputWithParameters_Error
 
+;
+; Normalize buffer pointer for next go round, if needed
+; 
+        test    di,di
+        jns     .clearBuffer
+        call    Registers_NormalizeESDI
 
 ;----------------------------------------------------------------------
@@ -332 +341 @@
 ; taken care of this, but I have seen cases where this is not true.
 ;
+        
 .clearBuffer:
         mov     dl,bh
@@ -344 +354 @@
 
 .clearBufferComplete:
+
         pop     ax              ; sector count and command byte
         dec     al              ; decrememnt sector count