[Coco] 68764/68766 EPROMs

[Walter Miraglia]

Count me in for 2 so I can upgrade the basic on my coco 1 with the latest, and one for extended basic :0)

Let us know when we can go ahead and order via PayPal.   :0)



> On Oct 5, 2015, at 10:44 PM, Zippster <zippster278 at gmail.com> wrote:
> 
> 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/
>> 
>> 
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>> 
>> 
>> 
>> 
>> 
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