SymbOS MSX multitasking operating system - help needed!

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By Prodatron

Paragon (1808)

Prodatron's picture

22-05-2006, 21:14

I think it's better to make different video files for MSX and CPC. The problem is, that not only the colour encoding is different, but (currently) also the aspect ratio. So the MSX version will even have different frame sizes. The idea of having 1 frame for CPC and one for MSX is not bad, but skipping inside a file also costs a little bit performance.

Btw, this is the routine, which converts graphics from CPC to MSX format:

;HL=data, DE=length
sprcnv1
ld c,(hl)
xor a:rl c:rla
add a:rl c:rla
add a:rl c:rla
add a:rl c:rla
ld b,a
rl c:rla:add a
rl c:rla:add a
rl c:rla:add a
rl c:rla:add a
or b
ld (hl),a
inc hl
dec de
ld a,e
or d
jr nz,sprcnv1

So too much for realtime, or maybe someone can optimize it?

By Manuel

Ascended (18747)

Manuel's picture

22-05-2006, 22:21

There's also the MGS format, which includes PSG, FM-PAC (actually called MSX-MUSIC) and SCC (which is in some Konami game cartridges).

By k0ga

Expert (77)

k0ga's picture

22-05-2006, 22:22

PT3 are made with Vortex Tracker (this is for M$ Windows) and some msx users made a replayer. Unfortunately, I don't have much idea of PSG tracker as I don't work with it Wink and I think there are a lot of "non standard o not much used" formats. Well, also there is a very good format which is the format MICROCABIN used for their games, and also there is a replayer.

Also, feel free to ask here: http://forum.karoshicorp.com about PSG :D

I did reverse ingeniering of MiicroCabbin driver. If you want implement this format you can get sources from http://msxbanzai.tni.nl/

I want do a good graphical programm to allow compose music in this format, but before see Symbos I didn't found a good environment for this. I am very busy now, but with things us you are doing life of msx developers are easier.

By karloch

Prophet (2157)

karloch's picture

22-05-2006, 22:59


However I'd like to see what conclusions you come to for support of the 16,256 + colour modes before I recode all the video and graphics side of symstudio - sorry (You've been on at me about the video for ages) but currently I'm busy with symbasic. Oh and spl the videos don't have sound, though i may look into this.
I think that MSX2's SCREEN 8 (256 colors) will be enough. Of course the MSX2+ screen modes are way cool, but they are not a must.

By Prodatron

Paragon (1808)

Prodatron's picture

22-05-2006, 23:11

Huh, very many possibilities for supportable sound formats! Smile I will need to make a list and do some priorisation.
I hope, that in this minute I fixed the last OS bug. Now I will try to do the video...

By Algorythms

Champion (288)

Algorythms's picture

22-05-2006, 23:13

screen 8 has a really stupid palette, which makes photos look bad. Specially skin colors look bad. The YJK mode gives allot more colors in the same # of bytes. Btw, you guys should look into the EVA movie format for MSX. It's got sound too.

By spl

Paragon (1470)

spl's picture

22-05-2006, 23:17

Huh, very many possibilities for supportable sound formats! Smile I will need to make a list and do some priorisation.
I hope, that in this minute I fixed the last OS bug. Now I will try to do the video...

Homer Simpson MODE ON

Humm... video....

Home Simpson MODE OFF Wink

By Prodatron

Paragon (1808)

Prodatron's picture

22-05-2006, 23:45

Btw, you guys should look into the EVA movie format for MSX. It's got sound too.

Yeah, that's crazy for a standard MSX2! I am still wondering, how they did the sound without any hardware extensions (except the IDE interface). On the CPC it's impossible, as without a sound hardware, where you can fill a buffer, you would get a complete destroyed sound output.

By spl

Paragon (1470)

spl's picture

22-05-2006, 23:49

Well, also EVA is only for V9950 or more... so you can only watch them in MSX 2+ or better. About video formats, I think that for MSX 2 is better the new video format NYYRIKKI is using in his version of DRAGON'S LAIR for MSX 2. But SymPlay video format is also great Wink

By Prodatron

Paragon (1808)

Prodatron's picture

22-05-2006, 23:52

Ops, the first video has a terrible quality but still a size of 40mb. I will try to make a second one...

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