[Coco] 6 Chip ^809 Computer -> Kipper SBC

[RETRO Innovations]

On 3/14/2015 8:14 AM, Gene Heskett wrote:
> Jim, this exactly the thinking that resulted in the coco shipping with an
> address decoder that only decoded in slices $20 wide.  So the on-board
> I/O used up $40 bytes when in fact it needed $08 bytes to service the
> two PIA's.
Which is why Tandy put the !SLENB signal on the bus.  By using it and a 
decoder, you can make the onboard PIAs only respond to $08 bytes of 
address space.

Jim