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

Thu Mar 12 03:08:38 EDT 2015

Hi Joe, 
Since the Terminal/Keyboard has a serial TTL interface to the host computer, it would need the MAX232 chip and the DB9 female connector in order to be able to physically connect to the Kipper SBC's RS-232 Serial Interface.  I can design it up that way.  It could be quite handy in that form.  It could then be used to plug up to any RS-232 serial based SBC project.  In the interest of time and maybe cost, the TTL to USB cable has advantages.  It seems if memory serves that Grant has attached to the USB to TTL interface cable method some type of warning.  I need to revisit the web page to see.  Yes, the USB to TTL cable could indeed power the Kipper SBC if all total the MAXIMUM current draw is 500mA.  I am putting a DC input jack on the Kipper SBC to have an alternate power method.

Kip Koon
computerdoc at sc.rr.com
http://www.cocopedia.com/wiki/index.php/Kip_Koon

-----Original Message-----
From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Joe Grubbs
Sent: Thursday, March 12, 2015 2:45 AM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] 6 Chip ^809 Computer -> Kipper SBC

Possible to create the keyboard and display interface that simply plugs into the serial port? Or go with the TTL/USB option (in lieu of the max232) and even have that supply the power to the interface?

--- Original Message ---

From: "Kip Koon" <computerdoc at sc.rr.com>
Sent: March 12, 2015 1:37 AM
To: "'CoCoList for Color Computer Enthusiasts'" <coco at maltedmedia.com>
Subject: Re: [Coco] 6 Chip ^809 Computer -> Kipper SBC

Hi Bill,
It actually would not be hard to go ahead and create the Terminal/Keyboard daughter board.  An MC68B50 ACIA chip with a little glue logic is all that's needed to complete the first Kipper Bus add-on card.  And like you said, modify the rom and both the original serial port and the second serial port with the Terminal/Keyboard could be used.  Cool!  Thanks for thinking this one out for me.  I could definitely not figure that one out last night.  Mr. Bipolar was giving a run for my money!  Tonight feels like it is going to be much better night for me and my mind.  I'm in a designing mood tonight!

Kip Koon
computerdoc at sc.rr.com
http://www.cocopedia.com/wiki/index.php/Kip_Koon

-----Original Message-----
From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Bill Nobel
Sent: Wednesday, March 11, 2015 9:20 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] 6 Chip ^809 Computer -> Kipper SBC

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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