From 1cf84431d86a72e874dbbb4deedac4db2d3580e7 Mon Sep 17 00:00:00 2001
From: florian <florian@freepascal.org>
Date: Wed, 3 Feb 1999 09:56:17 +0000
Subject: [PATCH]   + added simple support for monochrome video cards (not
 cursors yet),     thanks to Jeff Patterson

---
 rtl/go32v2/crt.pp | 64 +++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 62 insertions(+), 2 deletions(-)

diff --git a/rtl/go32v2/crt.pp b/rtl/go32v2/crt.pp
index 3f6a43092c..ff6a45df51 100644
--- a/rtl/go32v2/crt.pp
+++ b/rtl/go32v2/crt.pp
@@ -1,3 +1,4 @@
+{$DEFINE SUPMONO}       {  SUPMONO highlights the support of Monochrome }
 {
     $Id$
     This file is part of the Free Pascal run time library.
@@ -104,6 +105,9 @@ var
   DelayCnt,  { don't modify this var name, as it is hard coded }
   ScreenWidth,
   ScreenHeight : longint;
+{$IFDEF SUPMONO}
+  VidSeg : Word;
+{$ENDIF}
 
 
 {
@@ -128,6 +132,9 @@ end;
 function GetScreenHeight : longint;
 begin
   getscreenheight:=mem[$40:$84]+1;
+{$IFDEF SUPMONO}
+  If mem[$40:$84]=0 then getscreenheight := 25;
+{$ENDIF}
 end;
 
 
@@ -327,11 +334,19 @@ var
 begin
   fil:=32 or (textattr shl 8);
   if FullWin then
+{$IFDEF SUPMONO}
+   DosmemFillWord(VidSeg,0,ScreenHeight*ScreenWidth,fil)
+{$ELSE}
    DosmemFillWord($b800,0,ScreenHeight*ScreenWidth,fil)
+{$ENDIF}
   else
    begin
      for y:=WinMinY to WinMaxY do
+{$IFDEF SUPMONO}
+      DosmemFillWord(VidSeg,((y-1)*ScreenWidth+(WinMinX-1))*2,WinMaxX-WinMinX+1,fil);
+{$ELSE}
       DosmemFillWord($b800,((y-1)*ScreenWidth+(WinMinX-1))*2,WinMaxX-WinMinX+1,fil);
+{$ENDIF}
    end;
   Gotoxy(1,1);
 end;
@@ -348,7 +363,11 @@ Begin
   GetScreenCursor(x,y);
   fil:=32 or (textattr shl 8);
   if x<WinMaxX then
+{$IFDEF SUPMONO}
+   DosmemFillword(VidSeg,((y-1)*ScreenWidth+(x-1))*2,WinMaxX-x+1,fil);
+{$ELSE}
    DosmemFillword($b800,((y-1)*ScreenWidth+(x-1))*2,WinMaxX-x+1,fil);
+{$ENDIF}
 End;
 
 
@@ -530,11 +549,20 @@ begin
   y:=WinMinY+y-1;
   While (y<WinMaxY) do
    begin
+{$IFDEF SUPMONO}
+     dosmemmove(VidSeg,(y*ScreenWidth+(WinMinX-1))*2,
+                VidSeg,((y-1)*ScreenWidth+(WinMinX-1))*2,(WinMaxX-WinMinX+1)*2);
+{$ELSE}
      dosmemmove($b800,(y*ScreenWidth+(WinMinX-1))*2,
                 $b800,((y-1)*ScreenWidth+(WinMinX-1))*2,(WinMaxX-WinMinX+1)*2);
+{$ENDIF}
      inc(y);
    end;
+{$IFDEF SUPMONO}
+  dosmemfillword(VidSeg,((WinMaxY-1)*ScreenWidth+(WinMinX-1))*2,(WinMaxX-WinMinX+1),fil);
+{$ELSE}
   dosmemfillword($b800,((WinMaxY-1)*ScreenWidth+(WinMinX-1))*2,(WinMaxX-WinMinX+1),fil);
+{$ENDIF}
 end;
 
 
@@ -554,11 +582,20 @@ begin
   my:=WinMaxY-WinMinY;
   while (my>=y) do
    begin
+{$IFDEF SUPMONO}
+     dosmemmove(VidSeg,(((WinMinY+my-1)-1)*ScreenWidth+(WinMinX-1))*2,
+                VidSeg,(((WinMinY+my)-1)*ScreenWidth+(WinMinX-1))*2,(WinMaxX-WinMinX+1)*2);
+{$ELSE}
      dosmemmove($b800,(((WinMinY+my-1)-1)*ScreenWidth+(WinMinX-1))*2,
                 $b800,(((WinMinY+my)-1)*ScreenWidth+(WinMinX-1))*2,(WinMaxX-WinMinX+1)*2);
+{$ENDIF}
      dec(my);
    end;
+{$IFDEF SUPMONO}
+  dosmemfillword(VidSeg,(((WinMinY+y-1)-1)*ScreenWidth+(WinMinX-1))*2,(WinMaxX-WinMinX+1),fil);
+{$ELSE}
   dosmemfillword($b800,(((WinMinY+y-1)-1)*ScreenWidth+(WinMinX-1))*2,(WinMaxX-WinMinX+1),fil);
+{$ENDIF}
 end;
 
 
@@ -574,6 +611,10 @@ var
 begin
   regs.realeax:=$0100;
   regs.realecx:=$90A;
+{$IFDEF SUPMONO}
+  If VidSeg=$b800 then  regs.realecx:=$90A
+                  else  regs.realecx:=$b0d;
+{$ENDIF}
   realintr($10,regs);
 end;
 
@@ -623,7 +664,11 @@ begin
          end;
   else
    begin
+{$IFDEF SUPMONO}
+     memw[VidSeg:((CurrY-1)*ScreenWidth+(CurrX-1))*2]:=(textattr shl 8) or byte(c);
+{$ELSE}
      memw[$b800:((CurrY-1)*ScreenWidth+(CurrX-1))*2]:=(textattr shl 8) or byte(c);
+{$ENDIF}
      inc(CurrX);
    end;
   end;
@@ -784,11 +829,20 @@ begin
 { Load startup values }
   ScreenWidth:=GetScreenWidth;
   ScreenHeight:=GetScreenHeight;
+{$IFDEF SUPMONO}
+  If ScreenHeight=0 then ScreenHeight:=24;  { bug in my NEC BIOS }
+{$ENDIF}
   WindMax:=(ScreenWidth-1) or ((ScreenHeight-1) shl 8);
 { Load TextAttr }
   GetScreenCursor(x,y);
+  lastmode := mem[$40:$49];
+{$IFDEF SUPMONO}
+  If not(lastmode=Mono) then VidSeg := $b800
+                     else VidSeg := $b000;
+  TextAttr:=mem[VidSeg:((y-1)*ScreenWidth+(x-1))*2+1];
+{$ELSE}
   TextAttr:=mem[$b800:((y-1)*ScreenWidth+(x-1))*2+1];
-  lastmode:=mem[$40:$49];
+{$ENDIF}
 { Redirect the standard output }
   assigncrt(Output);
   Rewrite(Output);
@@ -802,7 +856,13 @@ end.
 
 {
   $Log$
-  Revision 1.2  1999-01-22 11:12:09  florian
+  Revision 1.3  1999-02-03 09:56:17  florian
+    + added simple support for monochrome video cards (not cursors yet),
+      thanks to Jeff Patterson
+
+                Tue  02-02-99 08:36 am   jeff
+    + added simple support for monochrome video cards (not cursors yet)
+  Revision 1.2  1999/01/22 11:12:09  florian
     + support of font8x8 added
 
   Revision 1.1  1998/12/21 13:07:02  peter