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using Manic Miner and Jet Set Willy game engines
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Message: 4920
Author: john_elliott_uk
Date: 09/10/2005
Subject: Re: How to compose tunes and then insert them in JSW64 engine?
In manicminerandjetsetwilly@yahoogroups.com, Igor Makovsky wrote:
How can I compose a tune and then insert it in my game rather easy,
without any coding and so only, using only soft? Is it possible? I'd
like to change and to compose new tunes and insert them in the intro
screen and as the in-game tune but I don't know how better to do it.
It's the same situation as in JSW128.
http://www.seasip.demon.co.uk/Jsw/jswtune.html
A tune is basically three sequences of numbers for the three
channels (as opposed to JSW48, where it's one sequence of numbers).
JSWED doesn't have a tune editor, so you either have to rely on imc's
original tune editor (downloadable from the above page), or find
another way to generate the bytes. I use an assembler to do this, but
you could also do it with a BASIC program like
10 LET b = 30000
20 LET a = 30006
30 POKE b, 256 * ((a/256)-INT(a/256))
40 POKE b+1, INT(a/256)
50 READ d
60 IF d < 0 THEN GO TO 100
70 POKE a,d
80 LET a = a + 1
90 GO TO 50
100 LET b = b + 2
110 IF b < 30006 THEN GO TO 30
120 SAVE "title.tun" CODE 30000, a - 30000
130 DATA 46,20,45,20,43,20,255,-1: REM channel 1
140 DATA 58,20,57,20,55,20,255,-1: REM channel 2
150 DATA 255,-1: REM channel 3
(the values given for the channels are valid, but only play 3 notes so
this won't produce much of a tune.)
To get the resulting TUN file into JSWED:
1. Save game in +3DOS format.
2. Edit TITLE.TUN, or generate an entirely new one.
3. Reload the game into JSWED.
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