[Coco] NitrOS-9 6309 L1 CocoSDC boots successfully on my Coco 1 F Board!

[Kip Koon]

Hi Bruce,
I finally found the board number.  I was looking in the wrong place.  It's a D board with 64KB of DRAM installed.  The DRAMs' chip number is 8040665 with Tandy's Logo and 16 pins.  Since I have brought up NitrOS-9 already on this board then it already has the required 64KB of ram memory.  
The F board Coco 1 has the piggy-backed chips and since I have brought up NitrOS-9 6809 L1 on it too then the ram is at least 64K.  The DRAM chip number is KT4164 so it looks like I have a 128KB Coco 1 F board.  The logic daughter board that plugs into the SAM chip socket has no name or number on  it so the board looks like a prototype.  Does anyone have the 128K J&R drivers for DECB and maybe OS-9?  If so, could they be used in NitrOS-9 L1?  Thanks for all the helpful info.  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 Bruce W. Calkins
> Sent: Saturday, October 31, 2015 8:54 AM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] NitrOS-9 6309 L1 CocoSDC boots successfully on my Coco 1 F Board!
> 
> There is a number somewhere  on the mainboard that ends in a letter, B, C, D or E.  The "F" board did not have a letter on the end of
> the board number.  It sounds like you might have a D board, however you need 64k to run OS-9/NitrOS9.  Piggybacked memory was
> generally 32k.  You might have the rare 128k J&R Banker memory upgrade.
> What are the numbers on the memory chips?
> Bruce W.
> ====================
> 
> On 10/31/2015 08:28 AM, Kip Koon wrote:
> > Hi Fellow NitrOS-9 CocoNuts!
> >
> > I tested the latest version of NitrOS-9 L1 early this morning on my
> > 6309 enhanced Coco 1 and it worked.  Who-Hoo!
> >
> > I don't know if this Coco 1 has a D Board in it or not.  This
> > motherboard has a 4K and a 16K jumper near the SAM chip and 8 DRAM
> > chips stacked on top the original 8 DRAM chips so it has a total of 16
> > DRAM chips along with several extra wires installed. It also has the
> > big tin shield surrounding and covering all the major chips.  If
> > anyone knows which version this is, please let me know.
> >
> > I finally have one of my Cocos running the NitrOS-9 6309 L1 v3.3.0
> > CocoSDC version.  I love it!  This first 6309 Coco 1 only has an RF
> > output so I need a composite video upgrade.  I'd like to get a hold of
> > the one with the Video and sound outputs on one rectangular PCB.
> > Since this particular Coco 1 has the original RF can with the 4 wires
> > going into it from the PCB, maybe I can whip up something, but I would like a nice composite video adapter for it.
> > If anybody has one they don't need, please let me know.
> >
> > Now I need to upgrade my Coco 1 with a Composite Video and sound
> > output board to a 6309 cpu!  :)  Actually I'm using HD63C09EP chips so
> > I'm wondering if there is any speed up circuits for the Coco 1.  Well
> > that is about all the news I have for now.  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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