[Coco] Coco video out.

[Little John]

I'm looking at the circuit now - John is with Kaylei & Dylan (they are his 
cousins - they're still in grade school - my Sis had children late in life)

----- Original Message ----- 
From: "Mark Ormond" <markormond at mtxsystems.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Saturday, October 23, 2010 9:38 PM
Subject: Re: [Coco] Coco video out.


> Just sitting here having a few beers with the soldering iron out.
>
> (Adding the switches for the rom selector. I'm hiding them under the cart 
> port.
> 1 SPST selects chip enable, turn it off and no more built in dos rom.
> 2 SPST select 16k bank
> 3 DPDT with off position, select lower 32k region with no autostart (pins 
> 7 and 8 on the cart), select upper bank with no autostart, and select 
> upperbank with autostart.
>
> Coconet and Drivewire on the lower half, Dungeons Of Daggaroth / Arkanoid 
> on the top half.
>
> At least this is what I hope it will do when I'm done.
>
> Was trying to add video and audio out to the same daughter board while I 
> was at it. I can come back and add that later.
> Have fun and enjoy the family.
>
>
> Later,
> dabone
>
>
>
> -----Original Message-----
> From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] 
> On Behalf Of Little John
> Sent: Saturday, October 23, 2010 10:32 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] Coco video out.
>
> Hey, all of that was my Son's so I'll have to go have a look at it. I'll 
> get
> right back with you. John is finally home but him and his cousins are
> spending some time together. I was so happy to see the kid :) Let me have 
> a
> look and see if he may have mixed something up when he put them into EAGLE
> from the hand drawn ones. I think they were tested on the CoCo 1 which has
> the MC1372 on the mobo... John assumed they'd work with the CoCo 2 which 
> has
> the 1372 in the RF can - let me check and i'll get back to you. I am 
> sitting
> here putting together a data separator out of  flip-flops, VCO and phase
> detector (the 9216B's seem hard for me to find so i'm looking at a 
> discrete
> solution)...
> JohnT
> ----- Original Message ----- 
> From: "Mark Ormond" <markormond at mtxsystems.com>
> To: <Coco at maltedmedia.com>
> Sent: Saturday, October 23, 2010 9:16 PM
> Subject: [Coco] Coco video out.
>
>
>> This one is for John.
>>
>> I tried your video out circuit tonight, twice. :)
>> I used a darlington and also tried the 2 npn circuits and got nothing out
>> of my coco2b.
>>
>> I double checked myself using your schematics and also download the brd
>> files to triple check myself.
>>
>> I am drawing the 5v and ground from the empty 4464 sockets and tapping 
>> pin
>> 12 of the mc1372 located in the rf modulator.
>> When the circuit is connected I lose tv out also.
>>
>> Anything special about this model over the older ones?
>>
>> Thanks,
>> Later,
>> dabone
>>
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>
>
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