#1 2009-03-09 23:29:31
sequencer crashes on startup
I am experiencing a weird problem with the sequencer.
When I select the sequencer mode in the main menu, immediately after it loads and shows the regular screen (for a split second) the screen goes white and a few garbled characters appear on the bottom of the screen . When i press some keys, a few of the garbled characters change slightly. I can hear faint noise on the audio out when I press some keys. The weird thing is that all the other applications are working just fine. This is really annoying as I bought the cartridge to be able to address multiple channels. Is this a problem with the cartridge or is something else wrong with my C64?
"I went to see the person writing our operating system. He had about 4-5 Sun computers and a big cage with a rabbit in it. And he'd spent a lot of time talking to the rabbit."
- Adam Chowaniec / co-creator of the Amiga computer
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#2 2009-03-10 16:21:14
Re: sequencer crashes on startup
Hi,
The obvious thing would be to try it on another C64 if at all possible. If not, try taking out the cart and putting it back in a few times just to make sure all of the contacts are touching.
Is it a P64 or MSSIAH?
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#3 2009-03-11 15:05:12
Re: sequencer crashes on startup
Unfortunately I dont have another (working) C64 at the moment, although that should change soon. However, I did find a possible cause of the problem. When I first tested my C64 I found that one of the joystick ports had a faulty channel causing the UP movement of the joystick to no longer work. Unfortunately this problem was on JOY2 so I decided to swap the two 6526 chips to see if the problem would go away. Indeed this caused the JOY2 port to now function properly. Today however, I found a wiring diagram of the C64 and saw that the userport is directly connected to one of the 6526 chips. I wouldn't be surprised if it is currently connected to the faulty one. This could cause problems when reading the cartridge I guess. I will try to switch the two chips again tonight and see if I can find some spares (or yet another C64 to cannibalize).
"I went to see the person writing our operating system. He had about 4-5 Sun computers and a big cage with a rabbit in it. And he'd spent a lot of time talking to the rabbit."
- Adam Chowaniec / co-creator of the Amiga computer
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#4 2009-03-12 12:11:27
Re: sequencer crashes on startup
Well last night I desoldered a 6526 chip from the not-at-all working C64 I had lying around and inserted it into the U1 socket of my working C64...
Sequencer now starts up without any problems whatsoever and my joystick up is working again wooohooo :-) So If you are having trouble with the cartridge and all else fails, check the 6526 ;-)
"I went to see the person writing our operating system. He had about 4-5 Sun computers and a big cage with a rabbit in it. And he'd spent a lot of time talking to the rabbit."
- Adam Chowaniec / co-creator of the Amiga computer
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