| Re: [hatari-devel] UFO STe demo |
[ Thread Index |
Date Index
| More lists.tuxfamily.org/hatari-devel Archives
]
Hi,
On tiistai 22 lokakuu 2013, Nicolas Pomarède wrote:
> On 21/10/2013 23:23, Eero Tamminen wrote:
> > When I just tested the UFO STe demo:
> > http://www.pouet.net/prod.php?which=60831
> >
> > I noticed something strange...
> >
> > With TOS 1.62, it freezes at start without "--fastfdc off",
> > but with EmuTOS it works fine also with "--fastfdc on".
> >
> > I didn't know that was TOS specific...
>
> yes, I can see this too ; I guess it's just a coincidence that it works
> with emutos and fastfdc. Certainly the demo uses some too tight timings,
> maybe depacking data as they're read and too fast fdc can mess with this.
>
> The TOS' read sector xbios function must have slightly different timings
> compared to EmuTos' one, but I don't think there's anything to fix on
> the emulation's side.
> "Fastfdc on" is speeding delays by a x10 factor, hopefully it should
> work in most cases, but when it doesn't it just means the demo/game
> expect (sometimes not willingly) timings from real HW.
Ok, I'll just add a note about "--fastfdc off" to the compatibility list.
- Eero