[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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>> Coco at maltedmedia.com

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>

>

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