From: varobert AT colba DOT net
Message-Id: <3.0.32.19990718051924.00797100@mail.colba.net>
X-Sender: varobert AT mail DOT colba DOT net
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Date: Sun, 18 Jul 1999 05:19:30 -0400
To: djgpp AT delorie DOT com
Subject: Re: still got double buffering prob. in 13h mode.
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Reply-To: djgpp AT delorie DOT com

At 02:04 PM 7/18/99 +0800, you wrote:
Try
movedata(_my_ds(),(int)double_buffer,screen,0,320*200);
The trick is to cast the pointer to an offset from DS.

>Hi Nate & GodOfWar (and others),
>
>I replaced the '*double_buffer' with plain 'double_buffer', but while
>compiling it comes back with:
>
>48:warning: passing arg 2 of 'movedata' makes integer from pointer without
>a cast.
>
>(This is why I initially used the '*double_buffer') Somewhere else is this
>giving me a headache, but where? Must have ovelooked something.
>
>--
>regards;
>Mark.
>
>
>#include <stdlib.h>
>#include <dos.h>
>#include <sys/movedata.h>
>#include <dpmi.h>
>
>typedef unsigned char byte;
>
>short screen;
>byte *double_buffer;
>
>void mode(byte mode){
>   union REGS regs;
>   regs.h.ah=0x00;
>   regs.h.al=mode;
>   int86(0x10, &regs, &regs);
>}
>  
>main(){
>   mode(0x13);
>
>   screen = __dpmi_segment_to_descriptor(0xa000);
>   double_buffer = (byte *)malloc(320*200);
>   memset(double_buffer,0,320*200);
>
>   double_buffer[10*320+10] = 4;
>
>   while (inportb(0x3da) & 8);
>   while (!(inportb(0x3da) & 8));
>   movedata(_my_ds(),double_buffer,screen,0,320*200);
>
>   getch();
>   mode(0x03);
>}
>
>
>