Issues with Jazz Jackrabbit on ThinkPad 380D \ VOGONS

Issues with Jazz Jackrabbit on ThinkPad 380D

Topic actions

First post, by Insidious611

Posted on 2017-09-09, 15:51

Insidious611 Offline

Rank Newbie

Rank: Newbie
Posts: 2
Joined: 2017-09-09, 15:33

I grabbed myself a ThinkPad 380D to use as a DOS/Win9x gaming machine, and it's so far been a very pleasant and usable experience. The sound card functions perfectly in DOS, most games run really well, etc.
However, I find myself with a really annoying graphical corruption issue with Jazz Jackrabbit, one of my favorite games, which seems to be intractable. I was hoping maybe someone had some idea as to what's going on and if there's any sort of fix. For reference, the onboard video is iirc a NeoMagic MagicGraph 128ZX

I've provided pictures because there's really not a good way to describe it in words.

20170909_114037.jpg

The full screen

20170909_114044.jpg

Enemy and status bar corruption

20170909_114102.jpg

Status bar corruption zoomed in

I also have an unrelated issue with music timing in Tyrian which I might bring up in another thread.

Hoping somebody has tips on how to resolve this/if it even can be resolved 😀

Reply 1 of 4, by K1n9_Duk3

Posted on 2017-09-10, 21:25

K1n9_Duk3 Offline

Rank Member

Rank: Member
Posts: 186
Joined: 2016-09-30, 11:07

According to ADG Episode 150, Jazz runs in a non-standard graphics mode.

Try connecting an external monitor and set the display to "CRT only" (or whatever your BIOS calls it). This has fixed some scaling-related issues on my DOS/Win9x laptops. If that fixes the issue, the ThinkPad's display is the problem, otherwise i'd assume it's the onboard video.