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New SMS Plus Beta

vbt - Nov 20, 2007

		vbt		Nov 20, 2007
			The main (and really impressive) change is the use of Faze from Fox68k . It gives speed for all previous "slow" games. It's still a beta version as the port of Faze/Raze to the Saturn is (maybe) not yet finished but it's good enough to release this version : http://vberthelot.free.fr/smsplus/sms_plus_raze.zi...

		Madroms		Nov 20, 2007
			I will test it before the end of the week Really good work (and success)!

vbt

Nov 24, 2007

		Madroms said:
		I will test it before the end of the week Really good work (and success)!

Great and please give me some feedback

		vbt		Dec 21, 2007
			Should I put a PAR version with cdunlock function in each release ? Also can I keep the cdunlock function on CD version ? I've never tried with the swap trick if the emu will start anyway.

		vbt		Dec 22, 2007
			New beta : * Added support of pause button * Max number of files set to 512 * ROM name erased correctly when moving between ROM list * C, L, R and X no more use triggered button method http://vberthelot.free.fr/smsplus/sms_plus_raze_em...

		vbt		Dec 28, 2007
			no real success...

RockinB

Dec 28, 2007

I've already downloaded it, but can't test it on a real Saturn yet, I'm sort of "on vacation". Instead, I'm working hard on Police Officer Smith, my C4-2007 entry. In the new year, there is time to play smsplus.

		vbt said:
		Should I put a PAR version with cdunlock function in each release ? Also can I keep the cdunlock function on CD version ? I've never tried with the swap trick if the emu will start anyway.

No, don't make a cdunlock in general. Swap-trickers would wonder, why it's not working and get annoyed. I once had such a binary and it was hard to perform a second swap trick. You could surely do it on button press or somehow detect, that the game is running from cart.

		mrkotfw		Dec 30, 2007
			Try reading from 0x2600c00 to 0x26002000. From what I know, you can probably parse it and check if the Saturn has an AR connected. I guess another way is to check if 0x5a or 0x5c is present when reading from 0x24ffffff. These are just guesses, though.

		vbt		Apr 5, 2011
			SMS Plus Saturn is coming back soon. I've applied a little change to call the slave cpu on sound update, it saves around 2 fps when vsynch is disabled. I'm trying to find some way to improve sound rendering.

mic

Apr 6, 2011

		vbt said:
		SMS Plus Saturn is coming back soon. I've applied a little change to call the slave cpu on sound update, it saves around 2 fps when vsynch is disabled. I'm trying to find some way to improve sound rendering.

How do you handle the sound now?

My suggestion would be the following:

Save all PSG port writes on the SH2 side, and send them to the SCSP (through SCU) once per frame, or maybe a couple of times per frame. Games aren't likely to run their music engine more often than that. Run your PSG emulation code on the M68k, which renders data at some suitable rate (maybe 22.5 kHz). Since the SCSP has plenty of slots you could use one slot per PSG channel to avoid having to do any software mixing. Or even two slots per channel to get double buffering.

vbt

Apr 9, 2011

		mic said:
		How do you handle the sound now?

Same as before, still common emulation, just sending PSG_Update & PCM_Task to second CPU.

	
	
		
		
			My suggestion would be the following:



Save all PSG port writes on the SH2 side, and send them to the SCSP (through SCU) once per frame, or maybe a couple of times per frame. Games aren't likely to run their music engine more often than that. Run your PSG emulation code on the M68k, which renders data at some suitable rate (maybe 22.5 kHz). Since the SCSP has plenty of slots you could use one slot per PSG channel to avoid having to do any software mixing. Or even two slots per channel to get double buffering.

I'd like to do that but I'm not able to.

mic

Apr 11, 2011

		vbt said:
		I'd like to do that but I'm not able to.

Well, I might be able to help with that. If I find the time maybe I can put together a proof-of-concept of this PSG emulation idea.

vbt

Apr 11, 2011

		mic said:
		Well, I might be able to help with that. If I find the time maybe I can put together a proof-of-concept of this PSG emulation idea.

That would be great!

I also use it on Green Beret/Mr Goemon emulation.

		vbt		Nov 11, 2011
			could it be a good thing if I merged sms plus saturn with final burn alpha ?

Chilly Willy

Nov 11, 2011

		vbt said:
		could it be a good thing if I merged sms plus saturn with final burn alpha ?

That would depend... would it make it easier to maintain? Would it increase the difficulty in debugging? Would it make it harder to add more features?

vbt

Nov 12, 2011

		Chilly Willy said:
		That would depend... would it make it easier to maintain? Would it increase the difficulty in debugging? Would it make it harder to add more features?

it's just i've updated smsplus and now they share the same(99%) saturn.c so i would have only one project to update.

Chilly Willy

Nov 12, 2011

		vbt said:
		it's just i've updated smsplus and now they share the same(99%) saturn.c so i would have only one project to update.

Well, then it sounds like it WOULD be better to combine them.

Being both emulators, it would seem like they would use most all the same things... same kind of interface to select a game, same options for display, sound, and input, yada, yada, yada. The main differences would be in the actual emulation code, which would be in separate files.