RGB-VGA Converter -- buy or build?

[Jim Leonard]

On 3/16/2010 3:09 PM, Tony Duell wrote:
> What are you really trying to do? Waht is the machine you are taking the
> outputs from, and what are you trying to do with them?

Trying to capture the output of a program running on an IBM 5160 that 
only looks correct via CGA RGB output.

>> I would need to go to school to understand what I would be looking at.
>
> Err, I didn't. For the record I have never had a single formal class in
> any form of electronicvs.

For the record, you are one of a kind.  I say that with the sincerest 
form of flattery.

Had I enough free time, I could learn it too, but I don't have much 
these days.  My free time in my youth was spent learning the hardware 
from the outside (ie. assembler programming), not the inside.

> I am pretty darn certain that this can't be done with a simple cable, and
> it can't be done properly with passive components. You are going to need
> some simple chips to do this.
> The input stage of a CGA monitor will kelp (and will show you how colour
> 6 is handled), but you will need to make modifications.

Fair enough; I'll retain this to show my electronics-savvy brother.
-- 
Jim Leonard (trixter at oldskool.org)            http://www.oldskool.org/
Help our electronic games project:           http://www.mobygames.com/
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A child borne of the home computer wars: http://trixter.wordpress.com/