Xref:	news2.mv.net comp.os.msdos.djgpp:6819
From:	singerb AT expert DOT cc DOT purdue DOT edu (Bryan Singer)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Inline ASM -- video buffer help!
Date:	3 Aug 1996 20:53:01 GMT
Organization:	Purdue University Computing Center
Lines:	32
Message-ID:	<4u0e7d$2vs@mozo.cc.purdue.edu>
NNTP-Posting-Host:	expert.cc.purdue.edu
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I have a question about this code that was posted here.
What is the variable "DosBase"?
Everything else works, but I don't know what DosBase is.


Here's the code:

void bitmap_to_video(struct MemBuf Buffer){

	__asm__ __volatile__ ("
	pushw %%es;
	pushw %%ds;
   pushl %%esi;
	pushl %%edi;
	movw  %0, %%es;
	movl  %1, %%ds;
	xorl  %%esi, %%esi;
	movl  $16000, %%ecx;
	movl  $0xa0000, %%edi;
	repz;
	movsl;
	popl  %%edi;
	popl  %%esi;
	popw  %%ds;
	popw  %%es"
	:
																												: "g" (DosBase), "g" (Buffer.BS)
																												: "memory"
																												);
																											}

- Raw text -