Resource centre for ZX Spectrum games
using Manic Miner and Jet Set Willy game engines
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Message: 5468
Author: john_elliott_uk
Date: 03/02/2006
Subject: Re: Andrew's ideas for implementing lifts in JSW
--- In manicminerandjetsetwilly@yahoogroups.com, andrewbroad
> (b) Guardian-class Offset 0 (Bits 6, 5 and 3 are unused, although
And JSW64:MM uses 58h for its almost-lift that you mention below.
> Geoff-mode uses Bits 4:3 for diagonal guardians, and Bits 6:5 for
> the phase of the guardian; JSW128 and JSW64 use Bits 3:0 for a 4-bit
> guardian-type, and Bits 7:4 for extended guardian-types - only when
> Bits 3:0 are 1000b).
> I'm also attacking the problem from the other direction - by reverse-
[...]
> engineering the JSW64:MM variant known as "m.z80", which contains a
> thing like a lift
> This code corresponds, to a large extent, with the "Experimental
I'd have thought the code in dmm64.zsm would have been more useful,
> lift support" in dmm64.zsm of JSW64:Dragon.
being commented and all.
Anyway: Yes, JSW64:MM and JSW64:Dragon MM contain my experimental
lift guardian (though I think only m.z80 has it actually hooked up
into the runtime). If you remember, that's why I had to do a new
version of the DOS installer for JSW64; the code to inject those
guardians into the Central Cavern was still there.
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