Frogger '07 volume level

[rga24]

Frogger '07 is a *brilliant* game but the music distorts on a real VIC-20 because the volume level is set too high. Does anyone know how to modify the code so that the volume is set to 8 (for example) instead of 15?

[Boray]

What? Maybe it's your hardware that needs to be adjusted instead?

[nbla000]

Frogger '07 is a *brilliant* game but the music distorts on a real VIC-20 because the volume level is set too high. Does anyone know how to modify the code so that the volume is set to 8 (for example) instead of 15?

In effect the value of $900E location is $de = %11011110 so volume is %1110 = #14.

Yes it could be changed of course but we need to look on the code... better a Victragic fix...

PS: The last Victragic post was on 18/10/2009

[rga24]

In effect the value of $900E location is $de = %11011110 so volume is %1110 = #14.

Yes it could be changed of course but we need to look on the code... better a Victragic fix...

PS: The last Victragic post was on 18/10/2009

Yes I wasn't sure what the actual Frogger '07 volume level is, I should have put "15 I assume", so in fact it's 14. Is there any enveloping of the volume level at all?

I noticed discussions of Frogger '07 mods got lost in a quagmire of NTSC fix requests, which would be a lot of work so I'm not surprised things went quiet.

This really would be quite a simple mod in comparison so I'm hoping someone else might be able to do it with just a hex editor, perhaps by setting breakpoints in an emulator.

The volume level of 8 would suit the particular VIC-20 I'm using here; a more comprehensive study is needed to examine the levels at which other VIC-20s start distorting with three tone channels enabled.

An indication of which memory locations need altering would be useful so that anyone can put their own preferred volume level in there instead. It definitely distorts quite a bit on my VIC as it is.

[davidv_]

The volume level of 8 would suit the particular VIC-20 I'm using here; a more comprehensive study is needed to examine the levels at which other VIC-20s start distorting with three tone channels enabled.

Yes indeed, eslapion and I had a go a figuring our that clipping for emulation purposes(both with a schematic analysis and with a scope), indeed volume 8 seems like a safe bet for correct headroom of 3 tones+noise.

I hope to post more details on my blog when i get a chance.

[nbla000]

An indication of which memory locations need altering would be useful so that anyone can put their own preferred volume level in there instead. It definitely distorts quite a bit on my VIC as it is.

I will look on it but do not expect it very soon

Btw did someone hear Victragic lately ?

[Pedro Lambrini]

Btw did someone hear Victragic lately ?

He seems to be another who's gone elsewhere... Still no sign of carlsson...

[Boray]

Btw did someone hear Victragic lately ?

He seems to be another who's gone elsewhere... Still no sign of carlsson...

I saw carlsson posting on a Swedish commodore forum some days ago...

[Jeff-20]

I think more than a few members have been chased away for one reason or another. Usually it's the ones rumored to be more combative (I wouldn't know because I don't hang out on other Commodore forums). I think Carlsson left after that recent censorship argument. In fact, I think several members involved in that conflict have went elsewhere. The funny thing is he'd probably come back if he were aware of this.

[rga24]

An indication of which memory locations need altering would be useful so that anyone can put their own preferred volume level in there instead. It definitely distorts quite a bit on my VIC as it is.

I will look on it but do not expect it very soon

Btw did someone hear Victragic lately ?

I figured out how to do it myself, here are the locations that need changing.

3ab6 A9 CE LDA #$CE make this #$C8
3b11 A9 DE LDA #$DE make this #$D8
3bc1 A9 DE LDA #$DE make this #$D8

And that's it!

[rga24]

I figured out how to do it myself, here are the locations that need changing.

3ab6 A9 CE LDA #$CE make this #$C8
3b11 A9 DE LDA #$DE make this #$D8
3bc1 A9 DE LDA #$DE make this #$D8

And that's it!

POKE 15031, 200
POKE 15122, 216
POKE 15298, 216

I have a patched version of the d64 file ready for uploading somewhere.

[Pedro Lambrini]

I could put it up on my Skydrive if you like.

[rga24]

I could put it up on my Skydrive if you like.

It's here:

http://www.mediafire.com/file/c16ky6wk1 ... 7-vol8.zip

[Pedro Lambrini]

And here's a more permanent link just in case the Mediafire one dies:

http://cid-c0ebae7cfc051a83.office.live ... 7-vol8.zip