Changeset 47 in xtideuniversalbios for trunk/Assembly_Library/Src/Display/DisplayCharOut.asm

Timestamp:

Oct 4, 2010, 7:22:40 PM (14 years ago)

Author:

aitotat

google:author:

aitotat

Message:

Assembly Library:
CGA snow prevention now works when copying strings on formatted printing.

File:

• trunk/Assembly_Library/Src/Display/DisplayCharOut.asm (modified) (4 diffs)

trunk/Assembly_Library/Src/Display/DisplayCharOut.asm

@@ -2 +2 @@
 ; Project name  :   Assembly Library
 ; Created date  :   26.6.2010
-; Last update   :   22.9.2010
+; Last update   :   4.10.2010
 ; Author        :   Tomi Tilli
 ; Description   :   Functions for outputting characters to video memory.
@@ -169 +169 @@
 ;       DX:     CGA Status Register Address (3DAh)
 ;   Returns:
-;       Interrupts disabled
+;       Nothing
 ;   Corrupts registers:
 ;       AL
 ;--------------------------------------------------------------------
 %macro WAIT_UNTIL_SAFE_CGA_WRITE 0
-    cli             ; Interrupt request would mess up timing
 %%WaitUntilNotInRetrace:
     in      al, dx
@@ -201 +200 @@
 ALIGN JUMP_ALIGN
 StosbWithoutCgaSnow:
-    call    LoadAndVerifyStatusRegisterFromBDA
+    call    DisplayCharOut_LoadAndVerifyStatusRegisterFromBDA
     jne     SHORT .StosbWithoutWaitSinceUnknownPort
 
     mov     ah, al
+    cli             ; Interrupt request would mess up timing
     WAIT_UNTIL_SAFE_CGA_WRITE
     mov     al, ah
+.StosbWithoutWaitSinceUnknownPort:
     stosb
     sti
     ret
-ALIGN JUMP_ALIGN
-.StosbWithoutWaitSinceUnknownPort:
-    stosb
-    ret
 
 ALIGN JUMP_ALIGN
 StoswWithoutCgaSnow:
-    call    LoadAndVerifyStatusRegisterFromBDA
+    push    bx
+    call    DisplayCharOut_LoadAndVerifyStatusRegisterFromBDA
     jne     SHORT .StoswWithoutWaitSinceUnknownPort
 
-    push    bx
     xchg    bx, ax
+    cli             ; Interrupt request would mess up timing
     WAIT_UNTIL_SAFE_CGA_WRITE
     xchg    ax, bx
+.StoswWithoutWaitSinceUnknownPort:
     stosw
     pop     bx
     sti
     ret
-ALIGN JUMP_ALIGN
-.StoswWithoutWaitSinceUnknownPort:
-    stosw
-    ret
-
-;--------------------------------------------------------------------
-; LoadAndVerifyStatusRegisterFromBDA
+
+
+;--------------------------------------------------------------------
+; DisplayCharOut_LoadAndVerifyStatusRegisterFromBDA
 ;   Parameters:
 ;       DS:     BDA segment (zero)
@@ -244 +240 @@
 ;--------------------------------------------------------------------
 ALIGN JUMP_ALIGN
-LoadAndVerifyStatusRegisterFromBDA:
+DisplayCharOut_LoadAndVerifyStatusRegisterFromBDA:
     mov     dx, [BDA.wVidPort]
     add     dl, OFFSET_TO_CGA_STATUS_REGISTER