Re: [hatari-devel] Chambers of Shaolin

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 28/11/2021 à 12:13, Grazey a écrit :
> Hi guys,
>
> I am in the process of fixing some Automation menus & cracks for the 
> forthcoming official site. Currently I am fixing menu 450 which contains 
> Thalion's Chambers of Shaolin.
>
> The crack has 4 code paths :-
>
> ST 1/2 meg
> ST > 1/2 meg
> STe 1/2 meg
> STe > 1/2 Meg
>
> For both half meg code paths the game plays standard YM chip music in 
> the intro (after the generic Thalion intro). On the ST if you have at 
> least 1 meg you can select to see the sample intro, this features a YM 
> digi routine. Similarly on the STe for 1 meg it will play sample music 
> using DMA.
>
> Both ST code paths work fine under Hatari, as does the half meg STe code 
> path (YM). However the STe digi music does not play correctly, the intro 
> music can be heard for a couple of seconds then silence.
>
> The MSA I'm using can be found here
>
> http://d-bug.me/shw/A_450v2.msa
>
> I also ripped the STe music for the SNDH archive :
>
> http://sndh.atari.org/sndh/sndh_sf/mad_max/games/cos_ste.snd
>
> This exhibits the same behaviour through SND-Player and Hatari.
>
> I'm using Hatari 2.31 but also tried 2.4 development version.
>
> Any ideas?

Hi

from a quick look at the STX version (to be sure the problem is not due 
to a bad crack), I can hear the same problem under Hatari.

but looking at the traces for dma sound, I see this when intro music 
starts :

DMA snd frame start low: 0xb0 at pos 0/0 video_cyc=23332 292@45 pc=4368 
instr_cycle 12
DMA snd frame start med: 0x02 at pos 0/0 video_cyc=23368 328@45 pc=436e 
instr_cycle 12
DMA snd frame start high: 0x08 at pos 0/0 video_cyc=23404 364@45 pc=4374 
instr_cycle 12
DMA snd frame end low: 0xd3 at pos 0/0 video_cyc=23420 380@45 pc=437a 
instr_cycle 12
DMA snd frame end med: 0x62 at pos 0/0 video_cyc=23456 416@45 pc=4380 
instr_cycle 12
DMA snd frame end high: 0x08 at pos 0/0 video_cyc=23492 452@45 pc=4386 
instr_cycle 12
DMA snd control write: 0x0001 video_cyc=23504 464@45 pc=438a instr_cycle 12
DMA snd control write: starting dma sound output
DMA snd new frame start=802b0 end=862d2

[.. then lots of dma sound reading until current address reaches dma end...]

DMA snd fifo pull pos 0 nb 8 fc
DMA snd fifo pull pos 1 nb 7 fa
DMA snd fifo refill adr=862d0 pos 2 nb 6 fa fb
DMA snd end of frame


So, it seems the sound replay sets dma start/end only once, not using 
loop mode, which explains why sound stops just after a few seconds. At 
first sight it doesn't look like an emulation issue.

does it works on real STE with 1MB RAM or more ?

Nicolas