[Coco] Coco3 under MESS and joysticks

[Mark McDougall]

On 11/04/2016 7:31 AM, Mark McDougall wrote:

> I should probably study the coco3 schematic before going any further...

Well this is annoying. The schematic in the Service manual is at odds 
with Tim's PIA "Cheat Sheet". Button 2 on each joystick is reversed 
between the two.

OK, sorted now. I don't really know what was going wrong before, but 
after re-assigning _all_ the joystick input mappings and using the PIA 
pin assignments in the schematics, it's all behaving properly now.

I think MESS got confused with the input mappings because I had it in a 
state where both PA2 & PA3 would generate button 2 *AND* space. But 
clearing all the mappings and starting again seemed to have done the trick.

None of this was helped by the fact that there is information online 
regarding joystick selection (CB2 vs CA2) _and_ Button 2 PIA port 
assignments that are actually incorrect. Add the above-mentioned 
confusion in MESS and the fact that I don't have a 2-button joystick, 
and it's been a nightmare trying to figure this stuff out.

FTR, LEFT joystick button 2 generates a phantom <SPACE> as you'd expect 
from a button on row#3 of the keyboard matrix.

Regards,

-- 
|              Mark McDougall              | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug> |   with less resistance!"