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

[Bruce W. Calkins]

I have a 256k J&R Banker.  I think the same drivers work. Unfortunately 
all my CoCos are in storage.  So far nobody has deciphered the 
modification to OS-9 needed to boot it on the Banker.  This code 
modification will be needed to modify NitrOS9 to boot on a Banker 
equipped CoCo.
Bruce W.

On 10/31/2015 09:24 PM, Kip Koon wrote:
> 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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>