Re: General 6809 card for 6502 machines

From: Nils Eilers <nils.eilers_at_gmx.de>
Date: Wed, 18 Oct 2017 20:28:34 +0200
Message-Id: <20171018202834.c0bc1c98bb018e704774a3a0@gmx.de>
> > And who might be willing to patch NitrOS/9 L2 for the PET?
> Boise is happy to do so.  
Great news!

> He would need the HW emulated in VICE (he said 
> he does not relish doing dev on a real SP9000 :-), but it would not be 
> that big of an effort.
Is a VICE developer already working on the required MMU emulation?

> If the 
> 6809 for C64/C128/VIC-20 and the SuperPET designs were reasonably 
> similar, he could whip both up.
I just wanted to shrink the SuperPET. I never thought of making a universal 6809 card for any other 6502 based systems. I do not know these systems good enough to do so. But if anybody does and points out required changes that don't collide with my requirements I'd be happy to include them.

> But, for starters, I will get the OS9 board online.  It is dirt simple, 
> and so should take only a few macrocells.
Highly appreciated!

> What dev toolchain you using for your CPLD?
Altera Quartus II Web-Edition 13.0.1 Service Pack 1.

Up to now, I wrote just a few lines of Verilog to create Q and E from a clock source, so there's still plenty of work to be done.

Nils

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Received on 2017-10-18 19:00:03

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