x86/DOS system backup via rs232?
cclist at sydex.com
Sat Nov 14 10:37:38 CST 2015
On 11/14/2015 07:52 AM, Jules Richardson wrote:
> On 11/13/2015 11:56 PM, Chuck Guzis wrote:
>> connected them with a Laplink parallel cable (I've still got a box of
> Roughly what length are the cables? And do you know if they do anything
> special internally regarding shielding of the data lines?
For my own product, way back in the dark old days, I designed one from
scratch and contracted for a couple hundred from a cable house. When
Laplink came out, I was surprised to find that it used exactly my setup.
How's that for coincidence?
So I changed my further orders to use the commodity LL cables--at about
half the price. Not as rugged as my design, but they worked fine.
Interlink uses the same cable.
All were 2m in length. I think 12 conductor commodity foil-shielded
cable will do the trick. Basically, you've got 4 data lines in each
direction, plus strobe and ground. It is possible (I don't know if
Interlink supports it) with PS/2 style bidirectional printer ports, to
do a full 8 bit transfer in both directions, but it can get touchy on
setup. The 4-bit cables nearly always work.
So a length of cable, 2 DB25M connectors and Bob's your uncle.
MIcrosoft calls/called it "Direct Cable Connection" and is supported
through Windows XP (Vista dropped it).
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