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Hi everybody.

I'm making a game with devkitSMS and I wanted to add some sfx.
I'm still learning the SMS architecture I understood the common things like banking, palettes, interrupts, etc... BUT I'm a total noob when it comes to sound :)

For testing I used theSFX.psg from the PSGlibDemo-SMS so I'm sure that the sfx is valid :)

Here is my process :

I add the sfx to my bank using assets2banks :

Quote

assets2banks directory/data_bank2 --firstbank=2

In the code I'm calling like this :

Quote

#include "PSGlib.h"
...
PSGSFXPlay( theSFX_psg, SFX_CHANNEL2 );
...

And I link the project like this :

Quote

sdcc -o main.ihx rel/crt0_sms.rel rel/PSGlib.rel lib/SMSlib.lib $(FILES_O)

Technically, I got no errors when I build the final rom but...

Nothing happens when I should get the sound :/

So my question is simple : Is there anything I do wrong ? Or maybe I missed a step ?

Thanks a lot for helping.

are you selecting the resource bank before playing the sound?

kusfo wrote

are you selecting the resource bank before playing the sound?

Yes :(

Are you updating PSGSFXFrame ?

like PSGFrame it need to be updated each frame.
Better to place them in vbl (at start) for linearity of each call.

ichigobankai wrote

Are you updating PSGSFXFrame ?

like PSGFrame it need to be updated each frame.
Better to place them in vbl (at start) for linearity of each call.

Thanks a lot !
I added PSGSFXFrame into my main loop and it's working perfect :)

Naarshakta wrote

assets2banks directory/data_bank2 --firstbank=2

assets2banks can directly handle your assets in multiple banks
I mean, you don't need to keep them in separate folders

sverx wrote

assets2banks can directly handle your assets in multiple banks
I mean, you don't need to keep them in separate folders

Yeah I saw but I want to have more control over it :)

I'm curious to know what control you need exactly.
Assets grouping (which is supported by assets2banks) should give you enough control to assure you don't ever need to have more control over your assets...

Yes, in fact maybe you can help me ^^

I don't really know the architecture so I was assuming that bank switching is time-consumming and the major problem I had is that I had to switch bank during display to access differents tilemaps stored in differents banks...
So I moved every assets I need in one "moment" of the game in the same bank

BUT maybe I'm wrong ^^

Also, for dev purpose and I temporally need somes of the assets to be in the same bank ( easier to test ) . If everything goes well, in the end , I won't need this anymore.

the bank switch is a pretty fast operation, the time it requires is the same as writing a single byte to RAM memory - because in fact that's what it happens.

as for keeping some assets together in the same bank, that's fairly common, exactly for the reason you described: you might need to access data from two assets at the same time and having to bank-switch back and forth would be a waste, that's why assets2banks supports assets grouping

let's imagine you have 3 assets called tilemap_a.bin, tilemap_b.bin and tilemap_c.bin and you need them to be allocated in the same bank: in your assets folder you would create an assets2banks.cfg file with this content:

{
tilemap_a.bin
tilemap_b.bin
tilemap_c.bin
}

then you can bank-switch to any of those assets the way you would normally do, and be sure you would have all them accessible :)

Yeah I saw that I could configure the assets2bank.cfg but I didn't take time to look at :p

For the moment I use my Makefile to do it but in the future I will look into the cfg file for assets2bank ^^

PS : thanks for help !

no worries, and you can do things the way you prefer, of course! :)

Author	Message
Naarshakta Joined: 27 Apr 2021 Posts: 29	devkitSMS and PSGlib Posted: Mon Aug 02, 2021 12:55 pm
Naarshakta Joined: 27 Apr 2021 Posts: 29	Hi everybody. I'm making a game with devkitSMS and I wanted to add some sfx. I'm still learning the SMS architecture I understood the common things like banking, palettes, interrupts, etc... BUT I'm a total noob when it comes to sound :) For testing I used theSFX.psg from the PSGlibDemo-SMS so I'm sure that the sfx is valid :) Here is my process : I add the sfx to my bank using assets2banks : Quote assets2banks directory/data_bank2 --firstbank=2 In the code I'm calling like this : Quote #include "PSGlib.h" ... PSGSFXPlay( theSFX_psg, SFX_CHANNEL2 ); ... And I link the project like this : Quote sdcc -o main.ihx rel/crt0_sms.rel rel/PSGlib.rel lib/SMSlib.lib $(FILES_O) Technically, I got no errors when I build the final rom but... Nothing happens when I should get the sound :/ So my question is simple : Is there anything I do wrong ? Or maybe I missed a step ? Thanks a lot for helping.

kusfo Joined: 29 Mar 2012 Posts: 885 Location: Spain	Posted: Mon Aug 02, 2021 1:41 pm
kusfo Joined: 29 Mar 2012 Posts: 885 Location: Spain	are you selecting the resource bank before playing the sound?

Naarshakta Joined: 27 Apr 2021 Posts: 29	Posted: Tue Aug 03, 2021 5:53 am
Naarshakta Joined: 27 Apr 2021 Posts: 29	kusfo wrote are you selecting the resource bank before playing the sound? Yes :(

ichigobankai Joined: 04 Jul 2010 Posts: 540 Location: Angers, France	Posted: Tue Aug 03, 2021 5:56 am
	Are you updating PSGSFXFrame ? like PSGFrame it need to be updated each frame. Better to place them in vbl (at start) for linearity of each call.

Naarshakta Joined: 27 Apr 2021 Posts: 29	Posted: Tue Aug 03, 2021 8:30 am
Naarshakta Joined: 27 Apr 2021 Posts: 29	ichigobankai wrote Are you updating PSGSFXFrame ? like PSGFrame it need to be updated each frame. Better to place them in vbl (at start) for linearity of each call. Thanks a lot ! I added PSGSFXFrame into my main loop and it's working perfect :)

sverx Joined: 05 Sep 2013 Posts: 3811 Location: Stockholm, Sweden	Posted: Wed Aug 04, 2021 5:52 pm
	Naarshakta wrote assets2banks directory/data_bank2 --firstbank=2 assets2banks can directly handle your assets in multiple banks I mean, you don't need to keep them in separate folders

Naarshakta Joined: 27 Apr 2021 Posts: 29	Posted: Fri Aug 06, 2021 5:18 pm
Naarshakta Joined: 27 Apr 2021 Posts: 29	sverx wrote assets2banks can directly handle your assets in multiple banks I mean, you don't need to keep them in separate folders Yeah I saw but I want to have more control over it :)

sverx Joined: 05 Sep 2013 Posts: 3811 Location: Stockholm, Sweden	Posted: Sun Aug 08, 2021 1:37 pm
	I'm curious to know what control you need exactly. Assets grouping (which is supported by assets2banks) should give you enough control to assure you don't ever need to have more control over your assets...

Naarshakta Joined: 27 Apr 2021 Posts: 29	Posted: Mon Aug 09, 2021 7:42 am
Naarshakta Joined: 27 Apr 2021 Posts: 29	Yes, in fact maybe you can help me ^^ I don't really know the architecture so I was assuming that bank switching is time-consumming and the major problem I had is that I had to switch bank during display to access differents tilemaps stored in differents banks... So I moved every assets I need in one "moment" of the game in the same bank BUT maybe I'm wrong ^^ Also, for dev purpose and I temporally need somes of the assets to be in the same bank ( easier to test ) . If everything goes well, in the end , I won't need this anymore.

sverx Joined: 05 Sep 2013 Posts: 3811 Location: Stockholm, Sweden	Posted: Mon Aug 09, 2021 9:28 am
	the bank switch is a pretty fast operation, the time it requires is the same as writing a single byte to RAM memory - because in fact that's what it happens. as for keeping some assets together in the same bank, that's fairly common, exactly for the reason you described: you might need to access data from two assets at the same time and having to bank-switch back and forth would be a waste, that's why assets2banks supports assets grouping let's imagine you have 3 assets called tilemap_a.bin, tilemap_b.bin and tilemap_c.bin and you need them to be allocated in the same bank: in your assets folder you would create an assets2banks.cfg file with this content: { tilemap_a.bin tilemap_b.bin tilemap_c.bin } then you can bank-switch to any of those assets the way you would normally do, and be sure you would have all them accessible :)

Naarshakta Joined: 27 Apr 2021 Posts: 29	Posted: Mon Aug 09, 2021 1:45 pm
Naarshakta Joined: 27 Apr 2021 Posts: 29	Yeah I saw that I could configure the assets2bank.cfg but I didn't take time to look at :p For the moment I use my Makefile to do it but in the future I will look into the cfg file for assets2bank ^^ PS : thanks for help !

sverx Joined: 05 Sep 2013 Posts: 3811 Location: Stockholm, Sweden	Posted: Tue Aug 10, 2021 2:05 pm
	no worries, and you can do things the way you prefer, of course! :)

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