[Coco] FPGA 6809

[Dave Philipsen]

I don't think so.  To be totally honest I'm not exactly sure how that 
works.  I'm assuming that the fitter will assign pins for you if you 
don't manually assign them.  If you go into the Pin Planner it should 
show you a diagram of the FPGA and then below that there is a section 
where you can see all of the pin assignments. You should be able to 
scroll down to the bottom of that section and double click on <<new 
node>> to make a pin assignment.

Quick question on NitrOS9:  Where are the defs files found in the 
repository?  I am using some defs files that someone else gave me on a 
boot disk image but when I try to assemble the Krn module it is choking 
on terms like "D.MLIM", "D.FMBM", "D.BTLO", and a few others.  I have 
fairly recent defsfiles (2011) and the defsfile uses os9defs, rbfdefs, 
scfdefs, and systype.  Am I missing anything?

Maybe I'm crazy for assembling this directly under NitrOS9 but the 
assembler works pretty quickly at 25 MHz.  I don't have the cross 
assembler and the dev system set up on a PC.


Dave Philipsen


On , Bill Nobel wrote:
> Would that be the fitter pins in the pin planner?  I saw those there
> and I thought it was a suggested pin.
> 
> Bill Nobel
> 
>> On Aug 31, 2015, at 4:30 PM, Dave Philipsen <dave at davebiz.com> wrote:
>> 
>> Just something else I thought of:  When starting a project out from 
>> scratch (i.e. CoCo3 or 6809 core on FPGA) there are some things to 
>> take into consideration when assigning pins to devices.  The Altera 
>> FPGAs are divided into physical banks and Altera suggests that the 
>> high speed signals such as address or data lines be grouped together 
>> within a bank or adjacent banks if at all possible.  Also, at least on 
>> some devices, there are certain banks that they consider more well 
>> suited for high speed stuff.  If you do a little research on the 'net 
>> you'll find some notes on this in the design considerations.
>> 
>> Dave Philipsen
>> 
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