12 Aug
2012
12 Aug
'12
4:23 p.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org
[mailto:cctalk-bounces at classiccmp.org] On Behalf Of Mouse
Sent: 12 August 2012 23:59
To: cctalk at classiccmp.org
Subject: Re: To all with interest in IBM 7090
The problem is that in general you can't. You can have eight separate links
but you can't have them carrying a byte stream, one bit per link. You can't
make all the links are identical. This means as speeds increase the bits
arrive at different times, so you can't clock them out a byte at a time. You
also get cross talk between the links. That's why we have gone SATA rather
than PATA.
http://www.ithinkibrokeit.co.uk/articles/sata-101/page2.php
These days you also get various flavours of SATA
and SAS, Fibre
Channel and FireWire. In fact as speeds rise serial
interfaces tend
to become the interfacee of choice.
At least until someone notices "hey, if we run another 7 data
pairs, we can get 8 times the data rate for free!". And the
cycle of reincarnation continues....
Mouse
Dave Wade G4UGM
Illegitimi Non Carborundum