TP port construction separated into this unit

rtl/go32v2/ports.pp

@@ -0,0 +1,139 @@
+{
+    $Id$
+    This file is part of the Free Pascal run time library.
+    and implements some stuff for protected mode programming
+    Copyright (c) 1993,97 by the Free Pascal development team.
+
+    These files adds support for TP styled port accesses
+    
+    See the file COPYING.FPC, included in this distribution,
+    for details about the copyright.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+ **********************************************************************}
+
+unit ports;
+
+{ this unit uses classes so
+  ObjFpc mode is required PM }
+{$Mode ObjFpc}
+
+interface
+    
+type
+   tport = class
+      procedure writeport(p : word;data : byte);
+      function  readport(p : word) : byte;
+      property pp[w : word] : byte read readport write writeport;default;
+   end;
+
+   tportw = class
+      procedure writeport(p : word;data : word);
+      function  readport(p : word) : word;
+      property pp[w : word] : word read readport write writeport;default;
+   end;
+
+   tportl = class
+      procedure writeport(p : word;data : longint);
+      function  readport(p : word) : longint;
+      property pp[w : word] : longint read readport write writeport;default;
+   end;
+var
+{ we don't need to initialize port, because neither member
+  variables nor virtual methods are accessed }
+   port,
+   portb : tport;
+   portw : tportw;
+   portl : tportl;
+
+  implementation
+
+{$asmmode ATT}
+
+{ to give easy port access like tp with port[] }
+
+procedure tport.writeport(p : word;data : byte);assembler;
+asm
+        movw    p,%dx
+        movb    data,%al
+        outb    %al,%dx
+end ['EAX','EDX'];
+
+
+function tport.readport(p : word) : byte;assembler;
+asm
+        movw    p,%dx
+        inb     %dx,%al
+end ['EAX','EDX'];
+
+
+procedure tportw.writeport(p : word;data : word);assembler;
+asm
+        movw    p,%dx
+        movw    data,%ax
+        outw    %ax,%dx
+end ['EAX','EDX'];
+
+
+function tportw.readport(p : word) : word;assembler;
+asm
+        movw    p,%dx
+        inw     %dx,%ax
+end ['EAX','EDX'];
+
+
+procedure tportl.writeport(p : word;data : longint);assembler;
+asm
+        movw    p,%dx
+        movl    data,%eax
+        outl    %eax,%dx
+end ['EAX','EDX'];
+
+
+function tportl.readport(p : word) : longint;assembler;
+asm
+        movw    p,%dx
+        inl     %dx,%eax
+end ['EAX','EDX'];
+
+end.
+
+{
+  $Log$
+  Revision 1.1  1999-09-01 14:47:31  pierre
+   TP port construction separated into this unit
+
+  Revision 1.4  1999/05/13 21:54:27  peter
+    * objpas fixes
+
+  Revision 1.3  1999/03/26 00:01:52  peter
+    * fixed rounding in global_dos_alloc
+
+  Revision 1.2  1999/03/01 15:40:51  peter
+    * use external names
+    * removed all direct assembler modes
+
+  Revision 1.1  1998/12/21 13:07:03  peter
+    * use -FE
+
+  Revision 1.12  1998/08/27 10:30:50  pierre
+    * go32v1 RTL did not compile (LFNsupport outside go32v2 defines !)
+      I renamed tb_selector to tb_segment because
+        it is a real mode segment as opposed to
+        a protected mode selector
+      Fixed it for go32v1 (remove the $E0000000 offset !)
+
+  Revision 1.11  1998/08/26 10:04:02  peter
+    * new lfn check from mailinglist
+    * renamed win95 -> LFNSupport
+    + tb_selector, tb_offset for easier access to transferbuffer
+
+  Revision 1.10  1998/08/11 00:07:17  peter
+    * $ifdef ver0_99_5 instead of has_property
+
+  Revision 1.9  1998/07/21 12:06:03  carl
+    * restored working version
+}