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"
																												);
																											}