[Coco] 68764/68766 EPROMs

[Zippster]

I’m thinking $10 assembled and with a programmed ROM,
ready to plug in and go.

- Ed


> On Oct 5, 2015, at 8:52 PM, Kandur <k at qdv.pw> wrote:
> 
> Very professional looking. How much are these?
> 
> Kandur
> 
> Monday, October 5, 2015, 5:20:03 PM, you wrote:
>> Hey guys,
> 
> 
> 
>> motherboards and F boards, even D boards (barely).
> 
>> Simple, cheap ECB ROM replacement for these machines.
> 
>> - Ed
> 
>> <https://drive.google.com/open?id=0B1sgl615FlGnUDRsa0J2ZVZwYkU
>> <https://drive.google.com/open?id=0B1sgl615FlGnUDRsa0J2ZVZwYkU>>
>> <https://drive.google.com/open?id=0B1sgl615FlGnN0p3YTZxd0NtUEk
>> <https://drive.google.com/open?id=0B1sgl615FlGnN0p3YTZxd0NtUEk>>
>> <https://drive.google.com/open?id=0B1sgl615FlGnRHVEMEhMcHlqSUE
>> <https://drive.google.com/open?id=0B1sgl615FlGnRHVEMEhMcHlqSUE>>
>> <https://drive.google.com/open?id=0B1sgl615FlGneGNOQTNNOTB4RVU
>> <https://drive.google.com/open?id=0B1sgl615FlGneGNOQTNNOTB4RVU>>
> 
> 
>>> On Sep 21, 2015, at 7:00 PM, Al Hartman <alhartman6 at optonline.net> wrote:
> 
>>> Very cool!
> 
>>> My burners will handle 68766 EPROMS, but being able to use a 2764 will help lots of folks.
> 
>>> Thanks for doing this!
> 
>>> -[ Al ]-
> 
>>> -----Original Message----- From: Zippster
> 
>>> I just started drawing an adapter up a few minutes ago.
> 
>>> I have quite a few CoCos that could use an ECB, so it’s something I’ve been
>>> intending to do anyway.
> 
>>> I’ll should have files off to OSH Park tonight or tomorrow, there’s not much to an
>>> adapter like this.
> 
>>> - Ed
> 
> 
> 
>>>> On Sep 21, 2015, at 5:53 PM, Al Hartman <alhartman6 at optonline.net> wrote:
> 
>>>> This is not for a disk controller. Ron needs an Extended BASIC ROM for a Coco he bought. I no longer have any masked ROMs, and offered to burn him one if he could get me the blank EPROMS.
> 
>>>> But a 2764 with an adapter will cost as much as that 68766 for $18.00, unless Ron can wire one up himself.
> 
>>>> Clearance isn't a problem for an ECB ROM.
> 
>>>> -[ Al ]-
> 
>>>> -----Original Message----- From: Arthur Flexser
> 
> 
>>>> by having a 28-pin 2764 or 27128 EPROM in a 24-pin disk controller socket
>>>> with pins hanging off the end and other pins bent outward to not plug in,
> 
> 
>>>> Art
> 
>>>> On Mon, Sep 21, 2015 at 6:33 PM, Arthur Flexser <flexser at fiu.edu> wrote:
> 
>>>>> There have been various such adapters in the CoCo and non-CoCo markets. I
> 
>>>>> one, though it is somewhat more expensive than those sold by others. There
>>>>> is not quite enough clearance for most adapters in the Tandy disk
>>>>> controllers--some have tried cutting a hole in the plastic cover, or just
>>>>> living with the cover not quite being able to snap shut (the screw will
>>>>> keep the cover from coming off, and the controller can still be inserted in
> 
> 
> 
>>>>> greatly magnified if you want to piggyback a SmartWatch real-time clock
> 
>>>>> method there in my own CoCo system.)
> 
>>>>> A consideration that also exists is that it may be harder to find an EPROM
>>>>> programmer capable of programming the 6876x series than for the 27xx EPROMs.
> 
>>>>> Art
> 
> 
>>>>> On Mon, Sep 21, 2015 at 6:14 PM, Mark J. Blair <nf6x at nf6x.net> wrote:
> 
>>>>>> Would it be more practical to make an adapter to plug in more common 27xx
>>>>>> series EPROMs? I don't recall how much physical clearance is in there.
> 
>>>>>> --
>>>>>> Mark J. Blair, NF6X <nf6x at nf6x.net>
>>>>>> http://www.nf6x.net/
> 
> 
>>>>>> --
>>>>>> Coco mailing list
>>>>>> Coco at maltedmedia.com
>>>>>> https://pairlist5.pair.net/mailman/listinfo/coco
> 
> 
> 
> 
> 
>>>> Coco mailing list
>>>> Coco at maltedmedia.com
>>>> https://pairlist5.pair.net/mailman/listinfo/coco
> 
> 
>>>> Coco mailing list
>>>> Coco at maltedmedia.com
>>>> https://pairlist5.pair.net/mailman/listinfo/coco
> 
> 
> 
>>> Coco mailing list
>>> Coco at maltedmedia.com
>>> https://pairlist5.pair.net/mailman/listinfo/coco
> 
> 
>>> Coco mailing list
>>> Coco at maltedmedia.com
>>> https://pairlist5.pair.net/mailman/listinfo/coco
> 
> -- 
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco