The early ethernet schematics are best read with the a copy of the
original patent (US 4,073,220) in hand. In particular, you can match up
figure 5 and the explanation in the text with the schematic from Xerox. I
wrote such a document decades ago but it has vanished along with many other
bits.
This is an early version. They made some changes like adding a protection diode
and resistor on the coax input
after a nearby lightning strike at PARC wiped out a bunch of them. I guess I
should pull apart the original Xerox
10 meg one which was designed by the same guy to see how similar they we
> On May 16, 2017, at 11:47 PM, Shoppa, Tim via cctalk
> wrote:
>
> Al just recently put this up on Bitsavers, November 1974 drawings for the
> first 2.94MHz Ethernet transceiver:
> http://bitsavers.trailing-edge.com/pdf/xerox/alto/ethernet/Ethernet_Transceiver_Electrical_Characteristics.pdf
Al just recently put this up on Bitsavers, November 1974 drawings for the first
2.94MHz Ethernet transceiver:
http://bitsavers.trailing-edge.com/pdf/xerox/alto/ethernet/Ethernet_Transceiver_Electrical_Characteristics.pdf
Neat to see the 15 pin AUI to Thicknet transceiver (well, a lower bandwidt
