Re: Re[2]: mLan and MacOS X
Re: Re[2]: mLan and MacOS X
- Subject: Re: Re[2]: mLan and MacOS X
- From: "Mikhail Matusov \(Stella Audio\)" <email@hidden>
- Date: Thu, 21 Nov 2002 23:17:07 -0500
Michael,
>
Yamaha has some stuff going with Fujifilm Micro, but good luck getting
>
your hands on it.
Believe me I am well aware of the problems associated with this route.
>
No, I think the best way to do AMP is not to worry
>
about hardware support, but to do it in software using general purpose
>
LLCs; and that's certainly doable right now.
Not quite. The major part of the AMP is clock recovery. And this requires
hardware support to be any good. Among general purpose LLC's there are only
2 that provide some minimal support of this functionality, one by Fujifilm
and another by Philips. The former is a phantom that you can't get separate
from Yamaha license and that costs a lot and the latter has some other
problems. Also, none of them has roadmap to 1394b, which is very suspicious.
>
That said, I too would like a PHY+LLC+I2S device, maybe with, oh,
>
sixteen I2S lines. Eight in, eight out. And everything's handled for me
>
already. (The Yamaha chip is actually pretty close to that.) Oh, and
>
how about eight or nine UARTs too? And an ARM7TDMI. And I'd like that
>
in a TQFP or PBGA. And I'd like it for less than $5 in onesies. From
>
Digi-Key.
As I said that's not the main issue really. PHY is separate in any case BTW.
The main problem is the LLC part.
>
(An aside: I've been assured by certain of the TI FireWire types that
>
the GP2Lynx is the (TI) chip to use for embedded pro audio type stuff.
>
The iceLynx is for consumer-electronics weenies. Yeah, you have to hook
>
up a PHY to the GP2Lynx, but that's really quite easy to do.)
While GP2Lynx is being used by some pro audio manufacturers right now, I
believe that they use it to run some proprietary protocols. I doubt any of
the existing pro audio Firewire devices (mLAN stuff, which hardly exists,
aside) can talk to each other...
>
For 1394 silicon, this is all too true. The 1394 silicon makers don't
>
seem to want to talk to anybody who's ordering less than 100k/year.
>
This is, well, kind of dumb, IMHO. Never mind, though; all we need is
>
data sheets, and MindShare has a very nice book on the standard itself.
>
I never call support lines unless I'm bored or desperate :) And yes,
>
you can order 1394 silicon from DigiKey. 'Nuff said.
Well, exactly, all we need is the datasheets and availability of the chips.
However, it seems that in this market segment you can get either none of
this two, or only one at best :)) They don't come both together. So, we are
left with GP2Lynx or PDI1394L40, which marginally fit the bill and more or
less force us to go with proprietary protocols or switch to USB2 or whatever
else.
/Mikhail
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