[Coco] CoCo3 RGB port question...

[Zippster]

Hmm, according to Henry, who has the service manual, it really is a no connect on the monitor side.
I guess it would explain it not being used if only the CoCo side was actually implemented.

It does seem all the software that wants an RGB monitor asks the user rather than doing an auto-detect.

My guess would be it was intended that the monitor simply pull that pin low to indicate it’s presence (either
connected to ground or a pull down) judging by the pull up and series resistor to the PIA on the CoCo side.

- Ed


> On Dec 30, 2017, at 6:24 PM, Allen Huffman <alsplace at pobox.com> wrote:
> 
> I do recall a PEEK you could use to see if a CM-8 was plugged up. We should ask someone like Steve Bjork is he knows the details of why it wasn’t used.
> 
> --
> Allen Huffman