Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!husc6!psuvax1!vu-vlsi!elh
From: elh@vu-vlsi.UUCP (Edward L. Hepler)
Newsgroups: comp.sys.att
Subject: wrastop on 7300 ?
Message-ID: <1067@vu-vlsi.UUCP>
Date: Mon, 17-Aug-87 22:50:20 EDT
Article-I.D.: vu-vlsi.1067
Posted: Mon Aug 17 22:50:20 1987
Date-Received: Wed, 19-Aug-87 04:33:53 EDT
Organization: Villanova Univ. EE Dept.
Lines: 34


I have been trying to use the wrastop(3T) function on my 3b1 with no
success.  I get a -1 returned with a perror() of "Bad Address".

The call looks somethine like:

wrastop(pw,
	ptr->where.address.pixrectptr,(short)((ptr->width+15)>>4),
	(unsigned short *)0,(short)0,
	(short)0,(short)0,
	(short)hh-ptr->xOffset-xscreen,(short)vv-ptr->yOffset-yscreen,
	(short)ptr->width,(short)ptr->height,
	SRCSRC,DSTOR,
	(unsigned short *)0)

where pw is the window number (from wcreate) and ...pixrectptr is a
pointer to an array of unsigned shorts (I know, it looks like a SUN
pixrect...).

I have used the Sun raster-op calls, so I am familiar with what should
be happening and I have printed the values that I am sending with
the wrastop call. All look OK.

Is there some trick that I need to know? What does the error really mean?
I looked at INTRO(2) and it says that Badd address refers to a hardware
fault while attempting to use an argument of a system call... Any ideas
which argument???

I am trying to place TeX fonts on the screen in support of a TeX previewer...

Thanks,

Ed Hepler
elh@vu-vlsi