Hi Roy,
On Sat, 2008-11-22 at 11:29 +0000, Roy Phillips wrote:
> at the front of the unit via a connector, and there is a location on this
> PCB for a for a 9-pin D connector!. If this had been used it would have
> made a serial port available at the front panel. More interesting is that
> there are tracks feeding what would have been pins 2,3 and 5 !
> Perhaps there was an intention in the original specification to provide a
> "service" serial port to the front of the unit - but would this have
> provided RS-422 and not RS-232 signals ?
RS-422 gives you, at least, RX+, RX-, TX+, TX-; your pins (2,3,5) cannot
be RS-422. I would spy voltage levels with a scope, and hope for
RS232-levels or TTL-levels.
TTL is easily shifted with a MAX232 or equiv.
> Roy
--
Björn
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