Hi Jim,

> I will label the board tonight.

That would be handy too.  I only meant the schematic diagram, though.

>> Also, Kicad <http://kicad.sourceforge.net> is a free (as in speech)
>> alternative to Cadsoft Eagle.  I haven't looked at yet, but if it is
>> good enough for a mobile phone <http://wiki.openmoko.org/wiki/Gta02-core>,
>> it should suffice for any hobby project.
>>   
> I've downloaded it, and it looks like a nice tool, but I've invested a  
> lot of time in EAGLE libraries and designs.  I admit I did not do an  
> exhaustive search, but I was having trouble finding a nice way to  
> convert libraries and designs to KiCAD.  The scripts I found were  
> incomplete or contained errors.

I didn't even go that far yet, but I will seriously consider using
Kicad for my next project, whatever it will be.  My latest project
is a tiny 5-volt power supply for powering and charging mobile devices
from a bicycle dynamo hub.

> I intended that folks would install a IC socket for the uC, and that  
> could accommodate connection to the unconnected pins via a daughterboard.

That is a possibility, if you cannot fit the connections on the main
circuit board.

>> If you boot up the computer with SENSE=0, it will "think" that you are
>> trying to rewind or fast-forward the tape, and it will be supplying power
>> on the MOTOR line.  That is why you need to control the SENSE line in some
>> way.
>>   
> Well, as it is wired right now, SENSE will come up as an input, so I  
> think I'm OK.

If you wire both SENSE signals (from computer and from external tape drive)
to GPIO pins, you should be fine.  SENSE is an I/O signal on some Commodores
and input only in others.

> I'll wire in the voltage divider for MOTOR.

Yeah, MOTOR needs to be input only in the microcontroller, and you can pass
it through to any external tape drive.

	Marko

       Message was sent through the cbm-hackers mailing list