The Vic I've been using for the last couple of years is playing up with two different Mega Carts. As soon as I turn the computer on, the machine automatically selects A World at War and keeps doing that when I press reset. I tried my second MC and had exactly the same problem.
I tried the Vic without anything in the expansion port and was able to run a short type-in program without any problems.
Anyone know what might be causing the problem and if it can be fixed?
Vic Cartridge Problems
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- Vic 20 Scientist
- Posts: 1195
- Joined: Tue Apr 28, 2009 3:51 pm
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- Vic 20 Scientist
- Posts: 1195
- Joined: Tue Apr 28, 2009 3:51 pm
There is a 1uf capacitor associated with 555 timer IC (which controls reset timing) within your Vic-20.
This electrolytic capacitor is likely dried out & outside of tolerance.
Replacing it should clear the problem.
This electrolytic capacitor is likely dried out & outside of tolerance.
Replacing it should clear the problem.
Mega-Cart: the ultimate cartridge for your Commodore Vic-20
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- Vic 20 Scientist
- Posts: 1195
- Joined: Tue Apr 28, 2009 3:51 pm
Problem solved. It turned out that one of my joystick buttons was jammed and that was what was causing the software to jump ahead of me.
I tried about five different Vics with both MCs and kept getting the same problem and then I pulled the joystick out and everything was fine.
I have to say that I'm greatly relieved because this is my best Vic-20 and is about as good as it gets in terms of both cosmetic appearance and audio/video performance.
Thanks to everyone who tried to help.
I tried about five different Vics with both MCs and kept getting the same problem and then I pulled the joystick out and everything was fine.
I have to say that I'm greatly relieved because this is my best Vic-20 and is about as good as it gets in terms of both cosmetic appearance and audio/video performance.
Thanks to everyone who tried to help.