As my program has often to write the full screen at one moment, I have
written procedures that write the characters first to a buffer in the
heap and then I copy the buffer to the video-memory with the command:

Move(Buffer^, Mem[VideoSeg ; $0000], 8000);
{ 8000 'cause I often use mode 8x8;
  VideoSeg should always be $B800 (no Herculs support) }

But my problem is that the procedure move isn't very fast. Maybe someone
has a faster routine that does the same as the Move-command?

Please mail me, if you have.

Thank you in advance,

Procedure Wmove(var src,dest; size: word);  assembler;
            asm
            cld
            push ds
            mov cx,size
            jcxz @out
            mov bx,cx
            les di,dest
            lds si,src

            mov ax,di
            and ax,1
            mov cx,ax
            rep movsb                   { word align DI }

            sub bx,ax
            mov cx,bx                   { Adjust the size }
            shr cx,1

            rep movsw

            mov cx,bx
            and cx,1
            rep movsb
   @out:    pop ds

            end;

Procedure Fmove(const src;var dest; size: word);  assembler;

            asm
            cld
            push ds
            mov dh,[test8086]
            mov cx,size
            jcxz @out
            les di,dest
            lds si,src
            cmp cx,12
            jbe @short
            mov bx,cx

            mov ax,di
            and ax,1
            mov cx,ax
            rep movsb                   { word align DI }

            sub bx,ax
            mov cx,bx                   { Adjust the size }

            shr cx,1
            mov dl,1

            cmp dh,2                    { Is the cpu 386+ }
            jb @not386

            cmp  cx,10
            jbe  @not386                { moves of 0-3 words }

            mov ax,di
            shr ax,1
            and ax,1
            mov cx,ax
            rep movsw                   { dword align DI }

            sub bx,ax
            sub bx,ax                   { Adjust the size }
            mov cx,bx

            {$ifopt g+}
            shr cx,2
            {$else}
            shr cx,1
            shr cx,1
            {$endif}

            mov dl,3
            db $66

   @not386: rep movsw

            xor dh,dh
            mov cx,bx
            and cx,dx
   @short:  rep movsb
   @out:    pop ds

            end;

As in your case the source and destination will be automatically dword
aligned one could simplify the above routines.

 db $C1,E9,$02; { shr cx,2 }

Jay
--

I am pleased to see that someone uses that much time to analyze my
posts to notice that.

Perhaps it's something else in your code that slows the program down!
Perhaps the way you are filling the buffer!!!  Either post some of your code
or analyze it yourself - I bet that you can optimize the rest of the code to
a better performance than you'll get by changing the Move command!!!

How many Frames per second does your text-mode program need anyway :))

Perhaps it's something else in your code that slows the program down!
Perhaps the way you are filling the buffer!!!  Either post some of your code
or analyze it yourself - I bet that you can optimize the rest of the code to
a better performance than you'll get by changing the Move command!!!

How many Frames per second does your text-mode program need anyway :))

Perhaps it's something else in your code that slows the program down!
Perhaps the way you are filling the buffer!!!  Either post some of your code
or analyze it yourself - I bet that you can optimize the rest of the code to
a better performance than you'll get by changing the Move command!!!

How many Frames per second does your text-mode program need anyway :))

Telemachos's got a point there, I guess. Although I find the
ASM-routines
superb (in fact I'm going to use them as well I think; thanx to all who
shared their knowledge with us) I do think you should check whether
there
are any _other_ parts of your code slowing your program down. Check it
with Turbo Profiler provided by Borland ... or email me for a crude
profiler
which I use for analyzing my PM-programs.

By the way, does anybody know why TPROF doesn't work properly with
PM-programs?

Greetings

At first I wanna thank everybody who helped me with that problem.
I think the asm-code which was sent to me will speed up my program
although I must say that it's very possible that not the Move-command
but another routine is the really reason of the slow speed:

For special window-operations I save and load the screen (and many other
data) to disk and I'm very sure that this is the really problem.
Well, now you could think: "Why doesn't this fellow save the screen to
memory???" - It has a simple answer: As my program has to execute very
large other programs I need every byte of the memory!

Please mail me, if you know how to speed up the read/write-access or if
you have an idea how to write the store/restore-routines in another way.
:-))

{$PUSH} { Save current directives }
{$G+}

286 code goes here

{$POP} { Restore previous directives }

-- Jay

It's also a good idea to read signatures - see Line 2 of the one you
quoted above.  "Acronym" is in the better dictionaries.

You do not give a valid-looking E-mail address, and your Message-ID RHS
appears non-compliant.

  > Moreover, one  should not rely on the Subject line,  especially if
  > changed, being  obvious   to   the   reader;   that  is reader-and
  > eyeballs-dependent.

  Sorry, that's the best I could do. "Off-Topic" indicates a different
  thread, "QHAH?"  indicates  a   question   on  the  specific acronym
  referenced in  your  post.  That way, you  wouldn't  have  to search
  DejaNews to  find the reference. This saved you enormous  amounts of
  time and effort.

  Clearly, the only reader who could answer the question  is yourself,
  and you  got the meaning fairly easily. So I guess you could  say it
  worked.

  > It's also  a good idea to read signatures - see Line 2 of  the one
  > you quoted above. "Acronym" is in the better dictionaries.

  Your list has some, but it omits "AIUI". This is fairly  common, but
  if you  do make a list, it might be helpful to newcomers  to include
  any acronyms that you use on the same page.

  Your list  also  omits  "ISTM", which you use  often,  and  is found
  nowhere else. Can you add it to your list?

  > You do  not  give   a   valid-looking   E-mail  address,  and your
  > Message-ID RHS appears non-compliant.

  Under "Personal  Identification",   you   discuss   reasons  for not
  including a correct email address. Spam is the obvious reason.

  I regret such measures are necessary, but nothing else seems to work.

Best Regards,

You have been reading my news-use page rather selectively, it seems.