Re: Apple //e RGB Card to CGA pinout?

[Knut Roll-Lund <kr-lund@nogarbage.online.no>]

Bryan Parkoff wrote:
>     There is no monitor FAQ.  How can I get information about the Apple //e 
> RGB Card's DB-15 port pinout and CGA Monitor DB-9 port pinout?
>     Do I need to find a adapter cable?  Or...Do I need to make adapter cable 
> from my own scratch?

I'm now waiting for my IIe RGB card so I'll have to figure that out. And 
I have a CGA monitor and no AppleColor 100 RGB.

CGA DB-9
1 Ground
2 Ground
3 Red
4 Green
5 Blue
6 Intensity
7 Reserved
8 Horizontal
9 Vertical

according to "the PC programmer's sourcebook"

IIe RGB DB-15
1 Ground
2 Green
3 Composite Sync
4 (not used)
5 Red
6 Ground
7 -5V
8 +12V
9 Blue
10 Intensity
11 (not used)
12 (not used)
13 Ground
14 (not used)
15 (not used)

according to Marco Orlandi 
http://www.exosystem.it/apple2/TheMarcorlandiModification_TTLRGB.pdf
(it was not easy to find the pinning of that)

I think; to use a CGA monitor I would need to extract the Horizontal and 
Vertical sync signals before they are combined. This is probably 
possible (analyzing the card when it comes) but...:

Actually the trick that Marco explains in the document above is a rather 
good one and I looked and I have a Mitsubishi HF2400 non multisync 
monitor that can take R G B and combined sync so wow this is my solution 
I think. Thank you Marco! When I got that monitor I thought that it 
would do composite video too but no...

His solution is very simple and I think it might even give a better 
image if intensity would intensify only the active colors. In this 
simple solution the intensity will also add to the inactive colors 
making a kind of gray addition. Maybe the bright, active colors are so 
bright that the effect on the inactive channels are not that noticeable. 
To do intensify only the active colors would need analog switches etc.

Knut