Date: Sat, 12 Mar 94 17:42:04 EST From: peprbv AT cfa0 DOT harvard DOT edu (Bob Babcock) To: mmoss AT panix DOT com Cc: djgpp AT sun DOT soe DOT clarkson DOT edu Subject: Re: What's wrong with my grafx routine? Reply-To: babcock AT cfa DOT harvard DOT edu > I'm trying to write a simple graphics routine using the GNU assembler which > is quite different from what I'm used to. On quick inspection, the problem appears to be that you have not loaded a selector into %es before using stosb. See libsrc\c\dos\dosmem.s for an example of how to get an appropriate selector.