lidnariq wrote:
Um. The triangle is out of tune with the pulse waves, and the values written to the noise channel seem to be broken in some other novel way... as though it can't ever turn it off?
It vaguely sounds like one of the bits in the triangle period is forced set? Comparing your recording to the NSF, sometimes it's flat and sometimes it's right. There's one point in the theme where the triangle is trying to play a G at 392Hz, but it instead plays something at ≈360Hz. In binary, those would be periods of b'10001111' and ... maybe b'10011111' ?
Do you have a flashcart or the ability to make one? Could you try playing around with
livenes ?
Yes! aside from not knowing it was called the triangle period did think it sounded like at least one stuck address line or something similar, your binary values would make sense, do those bits relate to a set of lines on the pcb which I can probe?
I have an eprom burner and quite a lot of carts, if there's a cart you know of which I can easily attach the livenes rom to I'll do it temporarily.
Thanks,
James.