Re: 6809 in a C64

From: Jim Brain <brain_at_jbrain.com>
Date: Wed, 23 May 2018 12:31:11 -0500
Message-ID: <ed3f12f7-80b6-ba05-45c1-4e9862b6bc7a@jbrain.com>
On 5/23/2018 10:31 AM, J. Alexander Jacocks wrote:
> Jim,
>
> This looks to be an excellent beginning.  I'm very enthusiastic about 
> the options for using the 6809, as I have always been impressed with 
> the overall execution efficiency of that CPU.
>
> Is there any interest for the c128 use of this cart?  The 80 column 
> RGB modes would be a significant plus for OS9.
As I am currently implementing the cart, there is no C64-specific issues 
with it.  It'll act like a dual processor machine with shared memory.  
Thus, by writing the correct drivers, one can use any facility of the 
C128, including REUs and such.  The 8502 of the C128 (or the Z80, I 
guess) would need to help move data to/from the 6809 cart.

Jim
Received on 2018-05-23 20:00:47

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