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Haze
Reged: 09/23/03
Posts: 5162
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Re: Pepper2?
06/20/21 12:20 AM


> The pepper2 set recently got a supposedly newer set of sound ROMs. With them it fails
> the self test.
> I took a quick glance and I believe the recently added rev 2 sound ROMs are bad
> dumps. If compared to the old supposedly rev 1 ROMs they have the following changes.
>
> 5a: 1 byte change at 58d. Changes a LDA (a9) to a NOP (89). By changing this back the
> melody is restored but the game still fails the self test
>
> 6a: 2 bytes changed: 1f to 0f at 5ca, 2f to 0f at 22c
>
> So 3 bytes changed total which cause the self test to fail and the first one also
> causes the melody to go missing.

yes, those look like bitrot, should really have been checked before they went in..

we're going to see more and more redumps / new dumps where ROMs have gone rotten, they weren't built to last this long.







Entire thread
Subject Posted by Posted on
* Pepper2? Divemaster 06/18/21 08:13 PM
. * Re: Pepper2? ICEknight  06/18/21 08:55 PM
. * Re: Pepper2? Osso1  06/18/21 09:55 PM
. * Re: Pepper2? Haze  06/20/21 12:20 AM
. * Re: Pepper2? Vas Crabb  06/20/21 07:26 AM

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