[Coco] 8k/16k bankable EPROM cartrdige board

Tue Sep 30 23:21:50 EDT 2014

The silkscreen covered traces go thorough, but
unfortunately the even and odd numbered pins get inverted,
such as the cartridge slot's #1 contact becomes #2 on the Y-cable's socket,
at least on my sockets. Perhaps I picked the wrong sockets for this job.
As you can see, I soldered the leads to the board.
http://qdv.pw/coco/?p=322  After all I got my Y-cable working very well.

Kandur

Sunday, September 28, 2014, 6:57:21 AM, you wrote:
> Awesome!  Have you tested it yet? Visually, the fit looks great.  A bit hard
> to see in the pics are the silk screen covered traces that direct-connect the
> opposing pads.  If this design is good, I can just modify it for 34/50 pin versions of the pitch is the same.

> Sent from my ASUS Infinity

> On Sep 27, 2014 10:21 PM, Kandur <k at qdv.pw> wrote:
> The 40-pin Card Edge Connector arrived from OSK Park.
> Thanks for the design Chad, excellent quality.
> The Y-cable is getting ready.
> http://qdv.pw/coco/?p=310

> Kandur

> Sunday, September 7, 2014, 9:20:24 PM, you wrote:
>> You will get status updates.  Once the boards or made OSHpark will receive
>> them back and mail them USPS to you with tracking.

>> -----Original Message-----
>> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Kandur
>> Sent: Sunday, September 07, 2014 10:57 PM
>> To: CoCoList for Color Computer Enthusiasts
>> Subject: Re: [Coco] 8k/16k bankable EPROM cartrdige board

>> Excellent! :)
>> "Payment for your order for 3 40-pin Card Edge copy boards has been received
>> from paypal"

>> Kandur

>> Sunday, September 7, 2014, 7:16:14 PM, you wrote:
>>> Taking Bill's advice here and trying out the TinyURL...

>>> http://tinyurl.com/n4z3dcy

>>> How's that for the the connectors Kandur?  Set of 3 for $9.00, free
>>> shipping.  They take PayPal.

>>> -----Original Message-----
>>> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Chad H
>>> Sent: Sunday, September 07, 2014 8:17 PM
>>> To: 'CoCoList for Color Computer Enthusiasts'
>>> Subject: Re: [Coco] 8k/16k bankable EPROM cartrdige board

>>> Well lets work on the 40 pin since its what we need. I can make
>>> modifications for 34 & 50 pin variants so no cutting will be
>>> required..if the 40 pin version is good starting point.

>>> -----Original Message-----
>>> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Kandur
>>> Sent: Sunday, September 07, 2014 7:55 PM
>>> To: CoCoList for Color Computer Enthusiasts
>>> Subject: Re: [Coco] 8k/16k bankable EPROM cartrdige board

>>> Sure, make a 40 and 50 pin wide quick design, to see the price.

>>> Kandur

>>> Sunday, September 7, 2014, 5:47:14 PM, you wrote:
>>>> How about I do a quick design and see what the price will be...

>>>> -----Original Message-----
>>>> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Kandur
>>>> Sent: Sunday, September 07, 2014 7:38 PM
>>>> To: CoCoList for Color Computer Enthusiasts
>>>> Subject: Re: [Coco] 8k/16k bankable EPROM cartrdige board

>>>> These have pins, fitting into proto boards.
>>>> I need what is on the bottom part of the ribbon cable.
>>>> http://tinyurl.com/l3by7bk

>>>> Kandur

>>>> Sunday, September 7, 2014, 2:49:55 PM, you wrote:
>>>>> Haha.  I saw a part number in his parts manifest that should be
>>>>> exactly what your looking for... The card edge to insert in the end
>>>>> if
>>>> your cable..

>>>>> He uses this for the cable ...
>>>>> http://www.digikey.com/product-search/en?KeyWords=c4pxg-4006m&WT.z_h
>>>>> e
>>>>> a
>>>>> der=se
>>>>> arch_go

>>>>> And this for the slots each pack go into ...

>>>>> http://www.digikey.com/product-search/en?KeyWords=c4pxg-4006m&WT.z_h
>>>>> e
>>>>> a
>>>>> der=se
>>>>> arch_go

>>>>> The other double-edged blade connector should be the final piece, or
>>>>> I could make one the same way I do the other boards..it would be
>>>>> very small and cheap to duplicate.

>>>>> -----Original Message-----
>>>>> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Kandur
>>>>> Sent: Sunday, September 07, 2014 4:38 PM
>>>>> To: CoCoList for Color Computer Enthusiasts
>>>>> Subject: Re: [Coco] 8k/16k bankable EPROM cartrdige board

>>>>> I saw this Cadillac before, all I need is a VW. :)

>>>>> Kandur

>>>>> Sunday, September 7, 2014, 2:37:38 PM, you wrote:
>>>>>> In lieu of obtaining a actual MPI, building one of these would be
>>>>>> best I think, IMO..
>>>>>> https://sites.google.com/site/tgmaxx/tandy-color-computer/expansion
>>>>>> -
>>>>>> i
>>>>>> n
>>>>>> terfac
>>>>>> e

>>>>>> -----Original Message-----
>>>>>> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Chad
>>>>>> H
>>>>>> Sent: Sunday, September 07, 2014 4:23 PM
>>>>>> To: 'CoCoList for Color Computer Enthusiasts'
>>>>>> Subject: Re: [Coco] 8k/16k bankable EPROM cartrdige board

>>>>>> I think that is just for visual keying.  I could always move it
>>>>>> flush so it's the same as the others on the edge.  Bill raises a
>>>>>> good point
>>>>> though.
>>>>>> I don't have any Y-Cables to test the thing.  I've heard others
>>>>>> have made Y-Cables before with mixed results.  Not sure if
>>>>>> something specific has to be done with the board or not.

>>>>>> -----Original Message-----
>>>>>> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of
>>>>>> Kandur
>>>>>> Sent: Sunday, September 07, 2014 4:02 PM
>>>>>> To: CoCoList for Color Computer Enthusiasts
>>>>>> Subject: Re: [Coco] 8k/16k bankable EPROM cartrdige board

>>>>>> Being such a short board,  it could be used without a cartridge.
>>>>>> To show how serious I am about this mod, opened my beloved Coco-3
>>>>>> and snapped a few photos, with Kip's EPROM board in the expansion slot.
>>>>>> to check how would it fit.
>>>>>> http://qdv.pw/coco/?p=299

>>>>>> Kandur

>>>>>> Sunday, September 7, 2014, 10:50:20 AM, you wrote:
>>>>>>> So far, I've been ordering them in sets of 3 from OSHPark.  That's
>>>>>>> the minimum order.  I am charged per square inch.  If the PCB
>>>>>>> doesn't need to
>>>>>> be
>>>>>>> lengthened, the price won't change.  I could theoretically delete
>>>>>>> the open notch at the top of the PCB and replace with the card
>>>> connector.
>>>>>>> This should work well if the PCB won't be in a cartridge housing.
>>>>>>> Not sure how it would effect things if it's mounted in a cartridge.

>>>>>>> I usually order another set once my last one has been sold.  Turn
>>>>>>> around time is 2-3 weeks.  I can design and order a sample set and
>>>>>>> see how it
>>>>>> turns
>>>>>>> out.

>>>>>>> -----Original Message-----
>>>>>>> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of
>>>>>>> Kandur
>>>>>>> Sent: Sunday, September 07, 2014 12:29 PM
>>>>>>> To: CoCoList for Color Computer Enthusiasts
>>>>>>> Subject: Re: [Coco] 8k/16k bankable EPROM cartrdige board

>>>>>>> Sounds perfect.
>>>>>>> How would that effect the price and when will you order the next
>>>>>>> run?

>>>>>>> Kandur

>>>>>>> Sunday, September 7, 2014, 6:45:28 AM, you wrote:
>>>>>>>> Or I could do a special version of the EPROM board with the
>>>>>>>> straight-thru male header.  Its really very simple change in the
>>>>>>>> board
>>>>>>> layout editor then the PCB house does it.

>>>>>>>> Sent from my ASUS Infinity

>>>>>>>> On Sep 6, 2014 10:28 PM, Kandur <k at qdv.pw> wrote:
>>>>>>>> Something like this for $6.95 + shipping
>>>>>>>> http://www.electronicplus.com/prodSearch.asp?prod_search=PC-501&S
>>>>>>>> u
>>>>>>>> b
>>>>>>>> m
>>>>>>>> i
>>>>>>>> t
>>>>>>>> =Search
>>>>>>>> 5 pins have to be cut off from this.
>>>>>>>> http://www.electronicplus.com/images/products/PC-501.jpg

>>>>>>>> Kandur

>>>>>>>> Saturday, September 6, 2014, 8:00:56 PM, you wrote:
>>>>>>>>> Your Y cable to card edge instead of 40 pin socket header

>>>>>>>>> On Sep 6, 2014 9:17 PM, Kandur <k at qdv.pw> wrote:
>>>>>>>>> This one seem to be simpler,
>>>>>>>>> all connections straight thorough on both side of the board.
>>>>>>>>> http://qdv.pw//eng/_photos/Computers/adapter.jpg

>>>>>>>>> Kandur

>>>>>>>>> Saturday, September 6, 2014, 6:24:40 PM, you wrote:
>>>>>>>>>> I'm sure I could...just would have to make sure of the pinouts
>>>>>>>>>> first

>>>>>>>>>> On Sep 6, 2014 7:38 PM, Kandur <k at qdv.pw> wrote:
>>>>>>>>>> After 3 tries and url edits, success. Very nice board.
>>>>>>>>>> If you had a 40 pin male IDC header on this board for an easy
>>>>>>>>>> Y-cable connection, I would order one for sure.
>>>>>>>>>> Could you make an adapter board with one end having a Coco
>>>>>>>>>> cartridge slot edge connector, the other end having a 40 pin
>>>>>>>>>> male IDC header for a Y-cable?

>>>>>>>>>> Kandur

>>>>>>>>>> Saturday, September 6, 2014, 4:57:33 PM, you wrote:
>>>>>>>>>>> Make sure you copy the whole link with numbers.  Emails to
>>>>>>>>>>> this forum often chop the links for some reason

>>>>>>>>>>> On Sep 6, 2014 6:30 PM, Kandur <k at qdv.pw> wrote:
>>>>>>>>>>> "This listing
>>>>>>>>>>> (Tandy-TRS-80-CoCo-Color-Computer-EPROM-Pak-Cartridge) has
>>>>>>>>>>> been
>>>>>>> removed, or this item is not available.

>>>>>>>>>>> Please check that you've entered the correct item number
>>>>>>>>>>> Listings that have ended 90 or more days ago will not be
>>>>>>>>>>> available for
>>>>> viewing.
>>>>>>> "

>>>>>>>>>>> Kandur

>>>>>>>>>>> Saturday, September 6, 2014, 2:09:37 PM, you wrote:
>>>>>>>>>>>> I have another batch of these in if anyone is interested.

>>>>>>>>>>>> http://www.ebay.com/itm/Tandy-TRS-80-CoCo-Color-Computer-EPRO
>>>>>>>>>>>> M
>>>>>>>>>>>> -
>>>>>>>>>>>> P
>>>>>>>>>>>> ak
>>>>>>>>>>>> -Cartridge
>>>>>>>>>>>> -/321514156488?

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