3 Jan
2007
3 Jan
'07
3:18 p.m.
On 1/3/07, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
I'll ocnfirm the Mac Plus has the RJ11 connetor for the keyboard and a
DE9 for the mouse (but miniDIN-8 conenctors for the serial ports, I
thought the older machines had DE9s for those too).
Older Macs did have DE9s for serial (printer/modem/Appletalk...)
Perhaps that's what I'm thinking of - the switch goes with the 3-pin
miniDIN Localtalk connectors, not 4-pin miniDIN ADB connectors.
-ethan
ADB?
Apple Desktop Bus. The first Macs (128k/512k/Plus?) had RJ-11-like the connector
looks much like an S-Video connector -
mini-DIN with 4 pins and, IIRC, a plastic tab in the male connectors
to trip a switch (termination?) inside the female connectors when
plugged together.
Does it? I know the 3 pin miniDIN used on the Localtalk network has a
switch in the socket that conencts a terminating resistor, and which is
openned when the plug is inserted, but I've never seen any evidence of
this on ADB. But admittedly I've never tried to trace out schematics of
an ADB'ed Mac.