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

Timestamp:

Oct 8, 2010, 3:44:05 PM (15 years ago)

Author:

Tomi Tilli

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/DisplayFormat.asm (modified) (3 diffs)

trunk/Assembly_Library/Src/Display/DisplayFormat.asm

@@ -2 +2 @@
 ; Project name  :   Assembly Library
 ; Created date  :   29.6.2010
-; Last update   :   4.10.2010
+; Last update   :   8.10.2010
 ; Author        :   Tomi Tilli
 ; Description   :   Functions for displaying formatted strings.
@@ -220 +220 @@
     dec     di                  ; DI = Offset where to move last byte formatted
     xchg    bx, ax              ; BX = BYTEs to prepend
-    call    .ReverseMoveCXbytesFromESSItoESDI
+    call    .ReverseCopyCXbytesFromESSItoESDI
     xchg    ax, bx
     call    .ReversePrintAXspacesStartingFromESDI
@@ -231 +231 @@
 
 ;--------------------------------------------------------------------
-; .ReverseMoveCXbytesFromESSItoESDI
-;   Parameters:
-;       CX:     Number of bytes to move
-;       DS:     BDA segment (zero)
-;       ES:SI:  Ptr to source in video RAM
-;       ES:DI:  Ptr to destination in video RAM
-;   Returns:
-;       DI:     Offset to character preceeding string just moved
+; .ReverseCopyCXbytesFromESSItoESDI
+;   Parameters:
+;       CX:     Number of bytes to copy
+;       DS:     BDA segment (zero)
+;       ES:SI:  Ptr to old location
+;       ES:DI:  Ptr to new location
+;   Returns:
+;       DI:     Updated to before last character copied
 ;   Corrupts registers:
 ;       AX, CX, DX, SI
 ;--------------------------------------------------------------------
 ALIGN JUMP_ALIGN
-.ReverseMoveCXbytesFromESSItoESDI:
-%ifdef ELIMINATE_CGA_SNOW
-    call    DisplayCharOut_LoadAndVerifyStatusRegisterFromBDA
-    je      SHORT .WaitUntilReadyToMoveNextByte
-%endif
-
+.ReverseCopyCXbytesFromESSItoESDI:
+    test    BYTE [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bFlags], FLG_CONTEXT_ATTRIBUTES
+    jz      SHORT .CopyWithoutDisplayProcessing
+
+    WAIT_RETRACE_IF_NECESSARY_THEN rep movsb
+    dec     di                  ; Point to preceeding character instead of attribute
+    ret
+ALIGN JUMP_ALIGN
+.CopyWithoutDisplayProcessing:
     eSEG_STR rep, es, movsb
-
-%ifdef ELIMINATE_CGA_SNOW
-    jmp     SHORT .AlignDIforFirstPreceedingSpace
-.WaitUntilReadyToMoveNextByte:
-    cli             ; Interrupt request would mess up timing
-    WAIT_UNTIL_SAFE_CGA_WRITE
-.MovsbWithoutWaitSinceUnknownPort:
-    eSEG    es
-    movsb
-    sti
-    loop    .WaitUntilReadyToMoveNextByte
-%endif
-    ; Fall to .AlignDIforFirstPreceedingSpace
-
-;--------------------------------------------------------------------
-; .AlignDIforFirstPreceedingSpace
-;   Parameters:
-;       DS:     BDA segment (zero)
-;       ES:DI:  Byte offset before last byte moved
-;   Returns:
-;       DI:     Offset to space preceeding moved string
-;   Corrupts registers:
-;       AX
-;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
-.AlignDIforFirstPreceedingSpace:
-    mov     al, [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bFlags]
-    and     ax, BYTE FLG_CONTEXT_ATTRIBUTES
-    not     ax
-    and     di, ax
     ret