4 Oct
2018
4 Oct
'18
10:43 a.m.
On Thu, Oct 4, 2018 at 11:39 AM Paul Koning via cctalk <
cctalk at classiccmp.org> wrote:
Is that the same as SQE? I always had to turn that bad-boy off or risk
collision storms :(
Warenr
On Oct 4, 2018, at 1:30 PM, Grant Taylor via
cctalk <
cctalk at classiccmp.org> wrote:
On 10/04/2018 11:26 AM, Paul Koning via cctalk wrote:
> That's sort of accurate. A quick look shows some key differences: V2
adds
the "collision presence test" -- verifying the collision detect signal
is working. There is also the "jabber timer" -- a watchdog timeout that
stops excessively long frames. And V2 introduces the loopback protocol
(protocol type 90-00).
That mostly sounds like the frame formats are the same on the wire and
that the
differences are in the protocols that use said frame.
> The collision presence test is somewhat of an interoperability issue:
if you
attach a V1 transceiver to a V2 NIC, the NIC would complain on every
transmit that it didn't get the collision test signal.
That makes me wonder about the "heartbeat" switch that I see on older
AUI transceivers.
Yes, I think that's the collision test. So in the OFF position you have a
V1 compatible transceiver, ON is needed for V2.