Re: [fuse-emulator-devel] Fuse sound routines

[Russell M. <rus...@nt...>]

Fred <fr...@sp...> wrote:

> Hi,
> I am trying to add support for the Timex TS2068 and other NTSC models to
> Fuse and the sound is not quite working as well as I'd like. I have made
> the timer happen at 17ms for NTSC machines and added a patch like:

A bit unpleasant to reuse the longer 50Hz buffer as a 60Hz buffer
without reallocating, but I suppose it's less hassle, and should work
as long as we *always* allocate for 50Hz in sound_init(). You should
add a comment in sound_init() to that effect IMHO, so that it doesn't
get `fixed' (i.e. broken :-)) in future - maybe add "/* MUST be 50 to
allocate buffers properly */" to the line in sound_init() which sets
sound_framesiz.

> The TS2068 machine timings are adjusted for the NTSC (262 lines), but I
> am still finding that the pitch of the beeper is different between the
> (NTSC) TS2068 and (PAL) TC2068. Do you think that there is anything that
> I'm missing to get the pitch the same?

The pitch of the beeper is based on four things - most obviously the
Z80 that's messing with the beeper :-), with the other three things
being tstates, machine_current->timings.tstates_per_frame, and
sound_framesiz. All I can suggest is to check that all four *are*
actually what you think they are.

-Rus.