[Coco] Different versions of the RS-232 Pak?

[K. Pruitt]

----- Original Message ----- 
From: "K. Pruitt" <pruittk at roadrunner.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Wednesday, July 29, 2015 5:14 PM
Subject: Re: [Coco] Different versions of the RS-232 Pak?


>
> ----- Original Message ----- 
> From: "Robert Gault"
> Sent: Wednesday, July 29, 2015 4:53 PM
> Subject: Re: [Coco] Different versions of the RS-232 Pak?
>
>
>> K. Pruitt wrote:
>>> Were there two different versions of the RS-232 Pak made?
>>>
>>> I have my original pak and none of the chips are socketed. I just picked 
>>> up
>>> another pak which has never been opened, and when I look down in to it I 
>>> can see
>>> what appears to be a socketed chip. Is this the ROM chip perhaps? If so, 
>>> can I
>>> remove that chip completely and put a clock chip in to it? I currently 
>>> have my
>>> clock chip in my Disto SC-II, but it's a real tight fit as it is stacked 
>>> with
>>> the ROM.
>>>
>>> The difference in these two RS-232 Paks are slight. The printing is 
>>> larger on
>>> the one with the suspected socketed chip and the label on the back is in 
>>> the
>>> middle of the Pak rather than down near the cartridge connector as on 
>>> the 100%
>>> non-socketed version.
>>>
>>> Any input is appreciated. Thanks.
>>>
>>>
>>>
>>>
>>
>> I have the Deluxe RS-232 PAK # 26-2226 with all ICs in sockets. I have 
>> removed the ROM chip and replaced it with a SmartWatch (c) containing a 
>> Dalas DS-1216E clock. It works quite well with NitrOS-9 and my own 
>> Basic/ml program that adds the ability to read the clock from Basic.
>> Any software that needs to read the RTC when not in the disk controller 
>> needs to either know which MPI slot is being used or must search through 
>> them.
>>
>> Keep in mind that the number of pins on this (28) and similar RTCs likely 
>> are greater than those on a ROM chip (24). That means may you need to use 
>> an adapter to get required connections. In my case, the RS-232 cover does 
>> not quite close completely but there is no problem fitting the case into 
>> an MPI.
>>
>> Robert
>>
>>
>
> I went ahead and popped it open. The socketed chip is a 28-pin 
> G65SC51P1-1.
>
> My other RS232 Pak has a different 28-pin 6551 and it is not socketed.
>
> All the same model number, of course.
>
>
>
> -- 

While we're on the subject, is it possible to use two RS-232 paks with the 
CoCo 3?

I notice there are drivers for both T2 and T3 available.

Does this require a hardware mod or are the drivers just addressed to 
different slots?

Thanks.