[Coco] [Bulk] AT306 Mouse Question

[Dave Kelly]

Joel Ewy wrote:
> Paul Fitch wrote:
>> There is a 3-pin header on the AT306 motherboard that says MOUSE.  How do I
>> use that?
>>
>>   
> My assumption, from the era in which the AT306 was produced, would be
> that that is a serial port.  So you should have a ground wire, a
> Transmit Data pin, and uh, er...  That's not enough pins.  I don't know
> enough about the serial mouse protocol.  Does the mouse ever need to
> receive data from the host?  E.g., some kind of configuration packet? 
> If not, then I suppose all you would need is power and data from the
> mouse to the host.  Power is probably supplied by a ground wire and one
> of the RS-232 handshaking lines (it would have to be one that's present
> in the 9-pin AT serial port).  Maybe CTS?  But on something like this,
> it's entirely possible that it's just connected to a +5 or +12 volt
> supply line.
> 
> You can pretty quickly determine if this is anywhere close to correct if
> you have an ohm meter (nice if it has a continuity beeper).  See if one
> of the pins hooks up to ground, (either an obvious ground plane or a
> ground wire on the power supply connector), and then try to trace one of
> the other two to the +5 or +12V supply.  Failing that, turn the beast on
> and see if you get 5-12 volts on one of the pins with a volt meter.
> 
> Probably somebody on this list has better information about the '306
> mouse port than I.

Who has the manual for the 306  that was bought from Boisy?
Those schematics covered that.   IIRC

Dave


-- 
A little rum in the morning coffee. Just to clear the cobwebs, ya know.