NuY Posted August 13, 2013 Share Posted August 13, 2013 (edited) I've been messing around with magazine type-in games again these last few weeks, at the minute I'm on Compute!. I came across Meteor Storm and couldn't get it working under XE OS. Tried all sorts but it wasn't happening. MC was the only way, but my MC-fu is weak. Several hours later and I've found a memory move routine that works backwards (necessary in this case). Several more hours later and I've got it working after figuring out how to do addition in MC (very painful). A couple more hours and I've integrated it into the game and it is working fine, to my eternal joy. Fix notes: This game refuses to work on XL/XE systems as originally printed. The reverse scroll of the meteors is achieved by fooling the OS into thinking it is in mode 0 when it is actually in mode 1, and then printing an insert line character at the top of the screen. While this works on the 400/800 OS, under the XL/XE it does something evil to the display RAM, corrupting it and making the game unplayable. To fix this, I have added a small MC routine to replace the print of the insert line character. The MC routine detects the address of the start of screen RAM, and copies lines 23-3 to the next line down in reverse order. A normal memory move wouldn't have worked as the source and destination overlap. And here they are; bootable ATR (Basic required), and the BAS and LST (as a TXT) files for your pleasure. Enjoy! PS, Atarimania are more than welcome to add this to their database as a fixed version. Meteor Storm (XL fixed).atr METEORXL.BAS METEORXL.TXT Edited August 13, 2013 by NuY 4 Quote Link to comment Share on other sites More sharing options...
Grevle Posted August 16, 2013 Share Posted August 16, 2013 Thank you, The game is fun to play. Quote Link to comment Share on other sites More sharing options...
feather Posted August 27, 2013 Share Posted August 27, 2013 Thanks! Screenshots: http://atarionline.pl/forum/comments.php?DiscussionID=1028&page=5#Item_20 Quote Link to comment Share on other sites More sharing options...
RodLightning Posted August 27, 2013 Share Posted August 27, 2013 Very cool. It's never too late to add a new universally compatible game to the 8-bit library. I was a Compute! subscriber for many years and sometimes typed in the listed programs. This is exactly the kind of obscure stuff I like !!! Thanks. Quote Link to comment Share on other sites More sharing options...
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