[Coco] coco xt-rtc adapter by Burke and Burke (FromTandyCoCoForums)

[Bob Devries]

Stephen,

I'm of the opinion from looking at that picture again, that the interface 
originally did not have the clock chip, hence the lack of battery or 
evidence of solder on the battery pads, and someone else soldered a socket 
onot the board, and inserted the DSW1215 chip.

There's an abundance of resin around the clock chip's pins, where there's 
very little on the other chips.

Regards, Bob Devries
Dalby, QLD, Australia

----- Original Message ----- 
From: "Stephen H. Fischer" <SFischer1 at Mindspring.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Monday, April 08, 2013 2:58 PM
Subject: Re: [Coco] coco xt-rtc adapter by Burke and Burke 
(FromTandyCoCoForums)


> Hi,
>
> The jumper in question appears to hovering over a 74ls32 pin 14 (VCC). You 
> have to have a clearer head than mine to put the pictures of back and 
> front together, so I may have messed up.
>
> If it was over pin 1 then I would say connect it as it is surely part of 
> the address decode.
>
> But pin 14 (VCC) has stumped me.
>
> The other jumper may be connected to ground, but I am not sure. That might 
> make VCC a better candidate.
>
> In any case, my eyes may be seeing a date of 1989 so the battery in the 
> smart watch must be dead.
>
> We can I expect to be able to get more pictures, but telling where the 
> other ends of the jumpers go, they would not be helpful.
>
> Knowing where in the address space the RTC appears might be helpful.
>
> SHF
>
>
> ----- Original Message ----- 
> From: "Bob Devries" <devries.bob at gmail.com>
> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> Sent: Sunday, April 07, 2013 9:30 PM
> Subject: Re: [Coco] coco xt-rtc adapter by Burke and Burke (From 
> TandyCoCoForums)
>
>
>> Hi Stephen,
>>
>> it would be useful to know which chip those wires connect to, and which 
>> pins (1 & 2?).
>>
>> Regards, Bob Devries
>> Dalby, QLD, Australia
>>
>> ----- Original Message ----- 
>> From: "Stephen H. Fischer" <SFischer1 at Mindspring.com>
>> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
>> Sent: Monday, April 08, 2013 2:02 PM
>> Subject: [Coco] coco xt-rtc adapter by Burke and Burke (From Tandy 
>> CoCoForums)
>>
>>
>>>
>>> http://tandycoco.com/forum/viewtopic.php?p=865#p865
>>>
>>> Coco xt-rtc problems
>>>
>>> I have a coco xt-rtc adapter by Burke and Burke. This one is supposedly 
>>> a pre-production model. Comes without a case. Bought it from a local 
>>> recycler, who obtained it from a collector who claimed everything worked 
>>> last time used.. Anyway, I can't get it to work, and from basic 
>>> inspection, I can see what might be a loose jumper. I'm going to post a 
>>> link to a my Flickr account, a close up of the board, maybe somebody can 
>>> tell me if this needs to be soldered to one of the near by points.
>>>
>>>
>>> http://www.flickr.com/photos/94829497@N08/8628815773/
>>>
>>> I am not sure if it was like this when I got it, or I damaged it on the 
>>> way home.. Thanks!
>>>
>>> -Shane
>>>
>>> --------------------------------
>>> Re: Coco xt-rtc problems
>>>
>>> http://www.flickr.com/photos/94829497@N08/8628815983/in/photostream/
>>>
>>> Does this help? The top right ic, top 2 pins on the left side..
>>>
>>> ------------------------------
>>>
>>> Hi,
>>>
>>> I do not have this device and cannot tell where this jumper should go 
>>> from the pictures.
>>>
>>> Can anyone else help?
>>>
>>> SHF
>
>
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