Resource centre for ZX Spectrum games
using Manic Miner and Jet Set Willy game engines
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Manic Miner & Jet Set Willy Yahoo! Group
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Message: 5216
Author: andrewbroad
Date: 04/12/2005
Subject: Re: A warning to those editing JSW64 games
john_elliott_uk wrote:
>At the risk of using up the last digit before 2.3.0, could we have
> If you started writing your JSW64 game by taking a copy of the
> original JSW64 (or JSW64:Manic Miner, or JSW64:Dragon) then you
> should go to the memory map and mark pages 9E00 and 9F00 as
> reserved.
> Otherwise you run the risk of overwriting the sprite-position table
> and/or the rope coordinates table.
>
> This is, of course, another good reason to start with a 48k game
> and upgrade rather than editing an existing JSW64 game.
this advice in the JSWED manual please? And/or new revisions of said
three games?
What about when we set out to write a MM game in JSW64? I am under
the impression that JSW64:MM uses a patch-vector for the swordfish-
routine (and other special effects?). So is it better to start with
JSW64:MM and fix the memory-map, or to upgrade 48K JSW to JSW64 and
deeply copy the patch-vectors from JSW64:MM into the new game?
When I open MANIC64{W,Z}.TAP in JSWED, it recognises them as JSW48
games, and the room-data appear to be completely garbled.
--
Dr. Andrew Broad
http://www.geocities.com/andrewbroad/
http://www.geocities.com/andrewbroad/spectrum/
http://www.geocities.com/andrewbroad/spectrum/willy/
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