[Coco] An X-10 usage for the Direct Connect Modem Pak

[K. Pruitt]

I used the cable from a CM11A controller. It has a phone line style 
connector on one end and a female DB-9 connector on the other end.
I have it set to answer mode (though I don't think it makes a difference) 
and I have the connect button turned on.

The CM17A module which it is plugged in to also has a female DB-9 connector, 
so I stuck a male-to-male adapter in between the two female connectors.

Seems to work fine.


----- Original Message ----- 
From: "George Ramsower" <georgera at gvtc.com>
To: <coco at maltedmedia.com>
Sent: Monday, August 17, 2015 4:21 PM
Subject: Re: [Coco] An X-10 usage for the Direct Connect Modem Pak


>  Kevin,
>  The DC Modem pak does not have those connections outside the pak. It 
> requires opening the pak and soldering wires to the 6551 inside to access 
> the DTR and RTS pins on that chip. So it DOES require a small 
> modification. Then those wires need to be wired to an outside DB9 or a 
> DB25 on the correct pins of each. The DC Modem Pak only has an RJ11 female 
> connector on the outside of the program pak.
>  How did you do you do this without modification to the program pak?
>   I'm dying to know.
> George R.
>
>
> On 8/17/2015 5:40 PM, K. Pruitt wrote:
>> The Direct Connect Modem Pak #26-2228, without modification, works as a 
>> host for the CM17A "firecracker" RF transceiver .
>>
>> I used the cable from a CM11A controller module which has a phone line 
>> connector on one end and a DB-9 female port on the other end to hook it 
>> via a male-to-male adapter to the CM17A module which also has a DB-9 
>> female port.
>>
>> The program I use to access the CM17A via the RS-232 Pak bit-bangs the 
>> DTR and RTS bits of the command register. The DC Modem Pak works the same 
>> way, just with a different address for the 6551, but it is still the DTR 
>> and RTS bit of the command register that gets hit. The same patterns to 
>> produce the logic codes with the RS-232 Pak apply to the DC Modem Pak. 
>> Baud rate is irrelevant to this application so the 300 baud limitation of 
>> the DC Modem Pak doesn't have any negative impact here.
>>
>> All in all not a bad use for the Direct Connect Modem Pak considering 
>> there is no hardware modification needed and it adds RF control of X10 
>> modules to the CoCo.
>>
>> I haven't done any reliability checking yet. This is just my report on my 
>> "what if I plug this thing here in to this thing here" experiment.
>>
>>
>>
>>
>>
>
>
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