Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!pacbell.com!tandem!zorch!amiga0!mykes From: mykes@amiga0.SF-Bay.ORG (Mike Schwartz) Newsgroups: comp.sys.amiga.programmer Subject: Re: Short Hello World Message-ID: Date: 16 May 91 20:42:32 GMT References: <1804@tardis.Tymnet.COM> <1991May7.001146.1830@cinnet.com> <1991May10.103117.4270@cs.umu.se> <1991May11.072139.781@starnet.uucp> <1991May13.220559.11706@visix.com> Organization: Amiga makes it possible Lines: 27 In article <1991May13.220559.11706@visix.com> brett@visix.com (Brett Bourbin) writes: >In article , dillon@overload.Berkeley.CA.US (Matthew Dillon) writes: > >|> Uh, actually, you don't want to use CLR either if you can help it >|> because CLR always *reads* the ea before writing a 0 to it. This >|> true all the way through 020's at least. > >Doesn't this also introduce problems with the custom chips, since you can >say something like "clear the COPPER 1 STROBE" with the CLR.W cop1xxx(AX) >command. This would read the register before writing the zero. I am not >sure about the COPPER STROBE, but I know some write-only registers get >very picky when you try to read them. > >|> Matthew Dillon dillon@Overload.Berkeley.CA.US >-- > __ > Brett Bourbin \ / /(_ /\/ 11440 Commerce Park Drive > ..!uunet!visix!brett \/ / __)/ /\ Reston, Virginia 22091 > brett@visix.com Software Inc (703) 758-2733 I've tested clr.w on the copper strobes and it works. -- **************************************************** * I want games that look like Shadow of the Beast * * but play like Leisure Suit Larry. * ****************************************************