[Coco] 6 Chip 6809 Computer PCB Price
Kip Koon
computerdoc at sc.rr.com
Tue Mar 10 18:23:00 EDT 2015
Hi Salvador,
Grant Searle's 6 Chip 6809 Computer has got to be the smallest 6809 based computer programmable in Microsoft's Extender Basic built using through hole parts DIP chips that is. :) Yes, the very Basic that comes in a stock Color Computer minus all the color graphics, sound and joysticks since the hardware doesn't exist in the 6 Chip 6809 Computer to support those functions.
Back 4 years ago, I had designed a PCB implementing this 6 Chip 6809 Computer, but never had it built. With the recent interest in the 6 Chip 6809 Computer on this list, I decided to revive that PCB design. I updated the original design with a few features I think are necessary in a 6809 based single board computer (SBC) such as this. This is a nice simple design a beginning hardware builder can put together. You can read all about Grant Searle's 6 Chip 6809 Computer at the link
<http://searle.hostei.com/grant/6809/Simple6809.html>
The original design has no expansion connector and a few people have expressed an interest in some type of expansion capability so I added what I call the Kipper Bus to this computer. For the story of the Kipper Bus and the Kipper Computer, see my wiki page below. Various versions of the original 6 Chip 6809 Computer are discussed as well. These are titles of the various discussions of the five versions I came up with back then.
5.1 Implementing Grant Searle's 6-Chip 6809 Single Board Computer (SBC), 32KB Ram, Serial I/O at $A000
5.2 Grant Searle's 6-Chip 6809 Single Board Computer (SBC), 40KB Ram, Serial I/O at $A000
5.3 Grant Searle's 6-Chip 6809 Single Board Computer (SBC), 48KB Ram, Serial I/O at $D000
5.4 Grant Searle's 6-Chip 6809 Single Board Computer (SBC), 55.5KB Ram, Serial I/O at $FF00
5.5 Grant Searle's 6-Chip 6809 Single Board Computer (SBC), 56KB Ram, Serial I/O at $E000
The designs are basically done. The 32KB Ram version is an exact duplicate of Grant's original design breadboarded. The 40KB Ram version is a direct out-growth of and an update to the 32KB version. I just added a 2nd 32KB Static Ram chip and used 8KB of it. When I finally received some HD63C09P chips, I replaced the MC68B09P chip with the new HD63C09P chip I now had on hand.
I wanted more ram in my little 6809 computer so I started exploring other designs. The 48Kb, 55.5KB and 56KB Static Ram versions are the results of further research. These other designs so far have not been tested on a breadboard yet though with the current rise of interest in this neat little computer, I just may breadboard them. I'll need to buy more breadboards and maybe a few parts. The software for the rom was never updated to reflect the changes in the I/O addressing since the hardware never got built. And that is where development stopped.
That is until the new interest in the 6 Chip 6809 Computer rose up on this list recently. Now, I just might continue since there seems to be a rising interest in this project. The more people that join in this discussion with more ideas to add to the mix, the more capable of a 6809 SBC can be designed, made and built. All schematics and PCB layouts are still in existence so if any of you have ideas to add, I can accommodate you.
Anyway, back to the current PCB design in question. All the inputs - interrupts, etc. - were tied high to VCC, so I added 1K ohm resisters on all inputs so now they can be used through the Kipper Bus connector.
A reset pushbutton was the only switch in the original design and I was having problems with my breadboarded version of the 6 Chip 6809 Computer powering up properly so I added a HALT pushbutton as well. I didn't see the initial sign on message for a long while. Now I could start using my little 6809 computer. I had a lot of fun with my little creation.
In preparing to make a PCB for this 6 Chip 6809 Computer, I decided to put LEDs on all the inputs into the 6809 Processor so the user could see what all the inputs were doing as they designed their own expansion circuits. Of course there is a Power LED as well.
The following links show the current design that I'm thinking of using to finally realize my goal after 4 years which is to build a 6 Chip 6809 Computer on a PCB of my very own.
This is the main schematic.
<https://www.dropbox.com/s/dx7wvrpkk7qzabm/Grant%27s%206-Chip%206809%20Computer%20-%20Exactly%20Like%20The%20Original%0Design%20tighter%20layout%20Kipper%20Bus%20sch.pdf?dl=0>
This is the power rails and DC input schematic.
<https://www.dropbox.com/s/avjexzf88bghgxe/Grant%27s%206-Chip%206809%20Computer%20-%20Exactly%20Like%20The%20Original%0Design%20tighter%20layout%20Kipper%20Bus%20sch%202.pdf?dl=0>
This is the PCB layout.
<https://www.dropbox.com/s/gj1k632ktzlhyfs/Grant%27s%206-Chip%206809%20Computer%20-%20Exactly%20Like%20The%20Original%20Design%20tighter%20layout%20Kipper%20Bus%20brd.pdf?dl=0>
Please let me know what you think. All ideas and suggestions are welcome. I'd like to make this a 6809/6309 based single board computer design we all can be proud of, so let those creative juices flow. Thank you for your interest in my project. Take care my friends.
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 Salvador Garcia
Sent: Tuesday, March 10, 2015 10:14 AM
To: coco at maltedmedia.com
Subject: Re: [Coco] 6 Chip 6809 Computer PCB Price
Hi Kip,
I just re-enabled emails from this list and am playing catch up. I am not sure I understand what this 6 chip 6809 computer is. Is there a link where I can find out more about it? I am interested in it and can pay the $70, but need to know more to determine whether this is something that I can find useful for my particular case. Thanks, Salvador
-----Original Message-----
From: Kip Koon <computerdoc at sc.rr.com>
To: 'CoCoList for Color Computer Enthusiasts' <coco at maltedmedia.com>
Sent: Mon, Mar 9, 2015 9:22 pm
Subject: Re: [Coco] 6 Chip 6809 Computer PCB Price
Hi Frank,
I would like to bring some to the CoCoFEST. How many do you guys think I should bring? Also, would anyone like to help sponsor this venture?
I'll be making 3 prototypes very soon to see how my updates to Grant's design works out.
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 Frank Pittel
Sent: Monday, March 09, 2015 12:51 PM
To: CoCoList for Color Computer
Enthusiasts
Subject: Re: [Coco] 6 Chip 6809 Computer PCB Price
Will you be
bringing any to the fest?
The Other Frank
On Fri, Mar 06, 2015 at 10:19:32PM
-0500, Kip Koon wrote:
> Hi Guys,
> A quick update. For orders of 20 PCBs, the
6 Chip 6809 Computer is
> now $70 each plus $6 shipping fully assembled or as a
full kit. The bare PCB is now $15 plus shipping to be determined Monday. Send funds for orders including your physical shipping address to my paypal email which is computerdoc at sc.rr.com. I'm really looking forward to what you guys create with these PCBs! As soon as all the orders come in, I'll order the PCBs and parts to get this project going. Take care my friends.
>
> 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 Kip Koon
> Sent: Friday, March 06, 2015 10:09 PM
> To: 'Coco Email
List'
> Subject: [Coco] 6 Chip 6809 Computer PCB Price
>
> Hi Guys,
>
> I
requested a price quote for the 6 Chip 6809 Computer PCB and received the standard Quantity 3 price instead of a quantity 10 price so the fully assembled or full kit price is $80 plus $6 shipping, and the bare PCB is $25. I'll have to see what the shipping is for a bare PCB Monday.
> International orders will
have custom shipping rates. The Schematic, PCB layout and Parts list will be shipped with each order. I will let you know when the Quantity 10 price comes in. Take care my friends.
>
>
>
> 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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