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

["Bill Garber" <willy46pa@comcast.net>]

"Knut Roll-Lund" <kr-lund@nogarbage.online.no> wrote in message 
news:-I2dnWRQnuGcrYPeRVnzvA@telenor.com...
> 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...:


IIRC, CGA monitors accept Composite Sync on
the Horizontal Sync pin. I'd have to research
it again to be sure. Been a long time.

Bill Garber