Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!rutgers!jvnca!njitsc1!bc From: bc@njitsc1.njit.edu (Bill Cheswick) Newsgroups: comp.os.minix Subject: Display bugs (was Re: Compiling under MSC) Message-ID: <167@njitsc1.njit.edu> Date: Tue, 28-Jul-87 09:05:22 EDT Article-I.D.: njitsc1.167 Posted: Tue Jul 28 09:05:22 1987 Date-Received: Wed, 29-Jul-87 05:45:37 EDT References: <1139@cognos.UUCP> Reply-To: cheswick@jvnca.csc.org (Bill Cheswick) Distribution: world Organization: New Jersey Institute of Technology, Newark NJ Lines: 28 Keywords: Sigma Designs Color 400, display adaptors Summary: Several adaptors don't scroll properly In article <1139@cognos.UUCP> brianc@cognos.uucp (Brian Campbell) writes: [... some stuff deleted ...] > Oh ya, there was some talk about scrolling problems with Hercules >cards somewhere in the distant past. The only fix I saw for this >problem was to change M_VID_MASK from 0FFF to 1FFF. I tried this, and >it didn't do the trick (although it did help a little). I'm using an >Everex Edge (HGA + CGA) that has 64k of RAM. I tried using masks of >16k, 32k and 64k as well, but none made the problem go away. >-- >Brian Campbell uucp: decvax!utzoo!dciem!nrcaer!cognos!brianc >Cognos Incorporated mail: 3755 Riverside Drive, Ottawa, Ontario, K1G 3N3 >(613) 738-1440 fido: sysop@163/8 I have had similar problems with the Sigma Designs Color 400 card. Changing the mask improves things. I think the display card's 6845 emulation doesn't wrap at the end of the buffer. Has anyone else run into this problem? I would be happier if Minix just did its scrolling in software and didn't fiddle with the base display address. Has anyone made that change to the 1.2 tty.c? Bill Cheswick ARPA: cheswick@jvnca.csc.org The Cygnherd of Morristown UUCP: bellcore!argus!njitsc1!bc