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 Post subject: Crazy SNES/SPC problem!
PostPosted: Sun Feb 04, 2007 10:01 am 

Joined: Sun Feb 04, 2007 9:52 am
Posts: 3
Location: Texas
I've been trying to track this bug for 3 days now! Here's what info i have on it...

this bug only appears on hardware, the rom runs fine when emulated
it happens only *sometimes* when i power on, i would think its an initializing problem, but im not sure which reg could cause this.. im using neviksti's initialization code.

it causes the SPC side to crash, i ran some tests and found a few corrupt bytes around the $7E0-$830 region. im not sure how these bytes got corrupted, but im suspecting the SNES-SPC transfer code.

my questions:
are there any uninitialized memory/regs that could cause this?
is my upload code correct?
is there anything that can cause interference and make a the few bytes of data corrupted?

here is the rom with the bug only appears on hardware and you have to power reset a bunch of times to catch it. the bg scrolling will freeze when it happens.

p.s. i also think my snes may be broken, or something... it would be nice if someone with a copier could confirm that this bug actually exists!

edit: the bug magically dissapeared when i was cleaning up some stuff :? ...but it would still be nice if someone could confirm this bug

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