Talk:IEEE 1394/Archive 2013
Latest comment: 10 years ago by 86.145.151.250 in topic Full- or half-duplex
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intro - creation dates - a typo?
"It was developed in the late 1950s and early 1960s by Apple..."
Please, this is absurd. Perhaps the author meant "late 1980s and early 1990s" ??
Full- or half-duplex
Until recently, the article indicated FW 400 was half-duplex and FW 800 was full-duplex. I have reverted an anonymous change making both are full-duplex. I haven't found any reliable sources yet but it looks like full-duplex capability was introduced in 1394b. -—Kvng 14:13, 26 September 2012 (UTC)
- Fascinating. Would it be possible, without violating the 1394b specification, to use S800 mode in half-duplex to double the throughput of large 1-way data transfers? 72.235.213.232 (talk) 14:29, 24 October 2012 (UTC)
- No, because the port hardware will not support it. The port has a pair of drivers and a pair of receivers, and one cannot do the job of the other. 86.145.151.250 (talk) 18:26, 11 November 2013 (UTC)
- Firewire 400 is full-duplex. This is because the cable contains two pairs of data cables, one to carry data one way and one to carry it the other simultaneously together at the same time. The S100 and S200 modes are similarly full-duplex for the same reason. Firewire 800 has increased the number of data channels permitting faster transfer using 2 data channels in each direction, but it is still full-duplex. It is USB1 and USB2 (but not USB3) that is half-duplex. 86.145.151.250 (talk) 18:24, 11 November 2013 (UTC)