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

[Bill Nobel]

Actually guys a more practical start to this is jump back a step and put Kips original design (with rs232) on 1 board and put the video keyboard interface as a option card on the Kipper bus with it’s own rs232 interface at a different address.  Once card is added, change out rom and you will end up with both.  It both helps in size restraints for footprint of 1 board, to the starter user for expandability options.

 I think most of us die hards want everything right away on one board, I myself included, as I am breadboarding a MMU similar to the Coco3’s GIME for memory up to 16mb based on this design

http://www.baltissen.org/images/mmu.png <http://www.baltissen.org/images/mmu.png>

 For  a similar Coco3 (not compatible) equivelent using Kips bus.  My MMU though in it’s current design uses 15 chips.

  And also now that Tormond actually proved a 32k Nitros9 on a Dragon32.  Nitros9 is possible on even Grant’s original design (with proper drivers written)

Bill Nobel

> On Mar 11, 2015, at 5:45 PM, Salvador Garcia <ssalvadorgarcia at netscape.net> wrote:
> 
> Regarding the missing chip for the RS232 port.
> 
> 
> I read Grant's page and if I understood correctly, this chip (plus 5 caps) is optional if a USB2TTL cable is used and connected directly to the 68B50's TX/RXDATA and /RTS pins. If that is correct then perhaps a good idea is to at least provide the thru holes for a five pin header so that a cable such as this one http://www.adafruit.com/products/954 can be connected directly to the board.
> 
> 
> Also, regarding the possible inclusion of the KB/video interface, I would include it as part of the SBC board if there was enough space assuming that the original SBC PCB size is kept. As long as the real estate is there, might as well populate it with whatever could be useful. Since the board's functionality is not affected if this interface is not present, any one that wishes to save a few dollars and does not necessarily want/need this interface can just leave the reserved area void of components. Personally I would probably like both options: The serial (I would use the USB2TTL option) and the KB/video interface just for flexibility if and when it is needed.
> 
> 
> Salvador
> 
> 
> 
> 
> -----Original Message-----
> From: Al Hartman <alhartman6 at optonline.net>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Wed, Mar 11, 2015 1:21 pm
> Subject: Re: [Coco] 6 Chip ^809 Computer -> Kipper SBC
> 
> 
> The flow control was meant to make the loading of software via the serial
> 
> interface more reliable and speedy.
> 
> Instead of pausing after each line, the
> SBC could control the flow of 
> incoming data.
> 
> -[ Al ]-
> 
> -----Original
> Message----- 
> From: Kip Koon
> 
> Hi Guys,
> 
> The 6 Chip 6809 Computer is now called
> the Kipper SBC.
> 
> The current version of the 6 Chip 6809 Computer is now called
> Kipper SBC v1.
> 
> 
> Kipper SBC v1.1 now has the 74LS04N and resister to control RTS
> on the
> RS-232 port per Grant Searle's instructions.
> 
> Now I will start designing
> the Terminal and Keyboard PCB.  I originally
> envisioned a multi-PCB Kipper
> computer.  I'm not sure yet if this will be an
> add on PCB or be put on the
> Kipper SBC PCB itself so off to Eagle Pro I go.
> :)
> 
> 
> 
> Kip
> Koon
> 
> <mailto:computerdoc at sc.rr.com>
> computerdoc at sc.rr.com
> 
> <http://www.cocopedia.com/wiki/index.php/Kip_Koon>
> http://www.cocopedia.com/wiki/index.php/Kip_Koon
> 
> 
> 
> 
> 
> 
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