Broken audio in Startropics 1 & 2

Broken audio in Startropics 1 & 2
by on (#105799)
I somehow broke audio in Startropics 1 and 2. I just get a weird, repeating, non-discernable noise. All other games work fine as far as I can tell. Do these games do anything special?

The rest of the game appears to work fine, just the audio is broken.
Re: Broken audio in Startropics 1 & 2
by on (#105802)
Noise is coming from the Noise channel. Go figure.

Typical APU writes are:

$10 = $00
$11 = $00
$17 = $40
$15 = $0f
$15 = $00
$11 = $50

This part repeated at the start of every frame and no other writes.
$15 = $00
$15 = $00
$15 = $08
$0c = $00
$0e = $01
$0f = $08
$15 = $08
$0c = $00
$0e = $01
$0f = $08
$15 = $00
Re: Broken audio in Startropics 1 & 2
by on (#105803)
Figured it out. It has something to do with disabling/enabling WRAM.
Re: Broken audio in Startropics 1 & 2
by on (#105804)
Docs say that it is not MMC3, but MMC6. That explains it. I'll hit this up later tonight.
Re: Broken audio in Startropics 1 & 2
by on (#105811)
fixed