Changeset 48 in xtideuniversalbios for trunk/Assembly_Library/Src/Display/DisplayContext.asm

Timestamp:

Oct 8, 2010, 3:44:05 PM (14 years ago)

Author:

aitotat

google:author:

aitotat

Message:

Changes to Assembly Library:
Added functions to clear Menu Title and Information areas.
Implemented automatic line change when writing Menu Title and Information areas.
CGA snow related functions have been moved to CgaSnow.asm.
Keyboard input functions no longer produce beep for backspace.

File:

• trunk/Assembly_Library/Src/Display/DisplayContext.asm (modified) (3 diffs)

trunk/Assembly_Library/Src/Display/DisplayContext.asm

@@ -2 +2 @@
 ; Project name  :   Assembly Library
 ; Created date  :   25.6.2010
-; Last update   :   28.9.2010
+; Last update   :   5.10.2010
 ; Author        :   Tomi Tilli
 ; Description   :   Functions for managing display context.
@@ -102 +102 @@
 
 ;--------------------------------------------------------------------
+; DisplayContext_PrepareOffScreenBufferInESBXtoESDI
+;   Parameters:
+;       BX:AX:  Ptr to off screen buffer
+;   Returns:
+;       Nothing
+;   Corrupts registers:
+;       AX
+;--------------------------------------------------------------------
+ALIGN JUMP_ALIGN
+DisplayContext_PrepareOffScreenBufferInESBXtoESDI:
+    push    ds
+
+    LOAD_BDA_SEGMENT_TO ds, di
+    xchg    ax, bx
+    mov     bx, es
+    call    DisplayContext_SetCharacterPointerFromBXAX  ; ES:DI now has the pointer
+
+    mov     bl, ATTRIBUTES_NOT_USED
+    mov     ax, BUFFER_OUTPUT_WITH_CHAR_ONLY
+    call    DisplayContext_SetCharOutputFunctionFromAXwithAttribFlagInBL
+
+    mov     bx, di
+    pop     ds
+    ret
+
+
+;--------------------------------------------------------------------
 ; DisplayContext_SynchronizeToHardware
 ;   Parameters:
@@ -123 +150 @@
 ;       DS:     BDA segment (zero)
 ;   Returns:
-;       ES:DI:  Pointer that was in DX:AX
+;       ES:DI:  Pointer that was in BX:AX
 ;   Corrupts registers:
 ;       AX