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 Post subject: Joystick issue
PostPosted: Thu May 16, 2019 12:51 am 
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Joined: Mon Mar 11, 2019 10:56 pm
Posts: 9
My joystick does work on Balloon Fight, Bomberman, however in Balloon fight it doesn't work. I pass nestest and Blarrg's CPU test and I have no idea why it could not work. Controller code is checked rechecked and rewritten few times still to no avail.
Now I have an idea maybe it's somehow related to dummy reads/writes. I've not implemented those however now start to think if they would help?
Can anyone shed me some light?


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 Post subject: Re: Joystick issue
PostPosted: Thu May 16, 2019 10:39 am 
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Joined: Sun Apr 13, 2008 11:12 am
Posts: 8367
Location: Seattle
LukasP wrote:
My joystick does work on Balloon Fight, Bomberman, however in Balloon fight it doesn't work. I pass nestest and Blarrg's CPU test and I have no idea why it could not work. Controller code is checked rechecked and rewritten few times still to no avail.
Even so, I think you've got a CPU bug.

Paperboy is the only game that we know of that relies on correct open bus behavior on the upper three bits of the controller ports, and I can't imagine we'd recommend people try Balloon Fight if it also depended on same.

Quote:
Now I have an idea maybe it's somehow related to dummy reads/writes. I've not implemented those however now start to think if they would help?
Unless you explicitly see something wacky like lda $3FFF,x being used to load the controller port, no, that won't help.


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