Log inRegister an accountBrowse CSDbHelp & documentationFacts & StatisticsThe forumsAvailable RSS-feeds on CSDbSupport CSDb Commodore 64 Scene Database
You are not logged in - nap
CSDb User Forums


Forums > C64 Coding > IRQ instable with music playing?!
2008-12-02 22:54
Scout

Registered: Dec 2002
Posts: 1570
IRQ instable with music playing?!

Hi

Rusty old Scout here...
I have coded a sideborder routine which neatly opens the sideborder.
No problem there but...as soon as I add a music-routine the IRQ becomes instable.
I just can't get the sideborders open again.

What could be the problem ?
 
... 10 posts hidden. Click here to view all posts....
 
2008-12-03 15:53
Cruzer

Registered: Dec 2001
Posts: 1048
Quote:
you should always add a music when you are coding
Word
2008-12-03 16:14
Scout

Registered: Dec 2002
Posts: 1570
Found it!

The problem was that the music was playing in the 'visible' area ($33-$fa). Moved it somewhere else, et voilá..a stable raster with music.

Yay & Woo!

Nevertheless, thanx y'all for replying!
2008-12-03 16:19
Oswald

Registered: Apr 2002
Posts: 5094
thats more of a workaround :) "multiple irqs" for me didnt translated as "double irq method" sorry.
2008-12-03 16:57
Radiant

Registered: Sep 2004
Posts: 639
It's possible to obtain a stable raster regardless of what you do during the graphic screen. Just moving code around until it "works" is a solution, but not a good one, since a subsequent code modification may render it all unstable again. I can't see any kind of stabilizing code at all in your example apart from the $d012 polling, so I guess it was/is simply stable by luck and of course that means it'll break if you add music (or pretty much anything at all).

If a double IRQ raster suddenly turns unstable it's pretty much the same thing: It looks stable, but the code is incorrect and any perceived stability can be attributed to chance. I wouldn't go so far as to recommend you always play music while testing; a main loop filled with sufficient nonsensical opcodes of varying cycle lengths is IME enough to reveal any false stability.
Previous - 1 | 2 - Next
RefreshSubscribe to this thread:

You need to be logged in to post in the forum.

Search the forum:
Search   for   in  
All times are CET.
Search CSDb
Advanced
Users Online
XmikeX
morphfrog
psych
Guests online: 146
Top Demos
1 Next Level  (9.7)
2 13:37  (9.7)
3 Mojo  (9.7)
4 Coma Light 13  (9.6)
5 Edge of Disgrace  (9.6)
6 What Is The Matrix 2  (9.6)
7 The Demo Coder  (9.6)
8 Uncensored  (9.6)
9 Comaland 100%  (9.6)
10 Wonderland XIV  (9.6)
Top onefile Demos
1 No Listen  (9.6)
2 Layers  (9.6)
3 Cubic Dream  (9.6)
4 Party Elk 2  (9.6)
5 Copper Booze  (9.6)
6 X-Mas Demo 2024  (9.5)
7 Dawnfall V1.1  (9.5)
8 Rainbow Connection  (9.5)
9 Onscreen 5k  (9.5)
10 Morph  (9.5)
Top Groups
1 Performers  (9.3)
2 Booze Design  (9.3)
3 Oxyron  (9.3)
4 Censor Design  (9.3)
5 Triad  (9.3)
Top Fullscreen Graphicians
1 Joe  (9.7)
2 Sulevi  (9.6)
3 The Sarge  (9.6)
4 Veto  (9.6)
5 Facet  (9.6)

Home - Disclaimer
Copyright © No Name 2001-2024
Page generated in: 0.039 sec.