Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: notesfiles Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!ihnp4!zehntel!hplabs!hp-pcd!uoregon!marka From: marka@uoregon.UUCP (marka) Newsgroups: net.micro.pc Subject: PCjr glitches Message-ID: <32300001@uoregon.UUCP> Date: Wed, 15-Aug-84 23:25:00 EDT Article-I.D.: uoregon.32300001 Posted: Wed Aug 15 23:25:00 1984 Date-Received: Sat, 18-Aug-84 00:56:51 EDT Organization: Univ of Oregon - Eugene, OR Lines: 22 Nf-ID: #N:uoregon:32300001:000:680 Nf-From: uoregon!marka Aug 15 19:25:00 1984 I'm looking for information concerning system hardware/software glitches on the IBM PCjr. I have an editor (written in Lattice C v1.04) that runs fine on the PC and XT (many 100s of hours of testing) but blows up within the first page of input on the PCjr. Memory size, allocated stack space, and position in core of the run image seem to have no (obvious) relationship to the problem. Are there known difficulties with : 1 - rapid key input in conjunction with direct video memory write (to either 0xb800 or 0x1c00)? 2 - touching 6845 registers directly. 3 - unintentional VGA resets 4 - bus errors Please reply by mail Randy Goodall c/o {hp-pcd,tektronix}!uoregon!marka