Re: Firewire

On Mon, 23 Jan 2006 12:33:06 +0000, Tony Morgan <tonymorgan@xxxxxxxxxxxxxx>
wrote:

>In message <rbh9t1t874mpovea18l1msg9c4mjdpcmi6@xxxxxxx>, Stuart McKears
><postmaster@!$!mckears.delobvious.com> writes
>>On Mon, 23 Jan 2006 09:30:52 +0000, Tony Morgan <tonymorgan@xxxxxxxxxxxxxx>
>>wrote:
>>
>>>In message <iaf7t1lonq06e0najuojcmaojk1sglmqo2@xxxxxxx>, Stuart McKears
>>><postmaster@!$!mckears.delobvious.com> writes
>>>>You may be asking, why more than one port?
>>>>
>>>>Reasons, maybe capture from a new camcorder while archiving to the old
>>>>camcorder, using an external firewire disc while printing to the
>>>>camcorder, etc.
>>>
>>>Indeed. But the main reason is that almost all current firewire chips
>>>support four ports. If the chip ports are there, it seems silly not to
>>>wire them to the backplate (or to header connectors).
>>
>>Yes, but few (any???) motherboards physically have 4 firewire ports.
>>
>>When I looked for a new motherboard, I couldn't find one with more than
>>3 ports,
>>one external and two onboard via a pin connection. True, that was about 2 years
>>ago and I seem to recollect that there was some uncertainty about whether all
>>the two onboard connections were actually individual ports.
>>
>>Also, at that time, the onboard firewire pin connectors seemed to
>>differ between
>>manufacturers. Is there a standard pin out?
>>
>Yes Stuart. It's part of the Standard. You can see the pin allocations
>at:
>http://www.interfacebus.com/Design_Connector_Firewire.html

Ta, interesting, didn't find it because I searched for a 10 pin connector!!!

Therefore, probably wrong about different headers from different manufacturers
only two years ago. However, I 'm sure I'm got a IEEE1394 back plate that didn't
fit a newer motherboard, either that or I was looking at the wrong connector!

regards

Stuart

www.mckears.com
.

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