[Coco] CM-8 monitor detection pin

[Stephen H. Fischer]

I remember a post saying that DECB and or OS-9 uses the PIA in such a way that the spare pin is useless.

SHF
----- Original Message ----- 
From: "Allen Huffman" <alsplace at pobox.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Wednesday, January 14, 2015 4:39 PM
Subject: Re: [Coco] CM-8 monitor detection pin


>
>> On Jan 14, 2015, at 5:38 PM, Arthur Flexser <flexser at fiu.edu> wrote:
>> 
>> Out of curiosity, what would be the advantage of the CoCo 3's "knowing"
>> whether a monitor was hooked up to it or not?  I suppose one could have
>> one's software go to the RGB palette if an RGB monitor was detected.  But
>> since users could not be depended upon to have the detection line enabled,
>> it just seems like that would create incompatibilities.  (Under OS-9, I
>> suppose you could have this be a driver option, but it seems like more
>> trouble than it is worth.)
> 
> Indeed, I suppose it would have been useful — all those programs asking you to select [C]MP or [R]GB on the startup screen, having to always remember to type “RGB” in BASIC to get the palettes loaded, having to type “montype x” in OS-9 (though most of us just automated that). I never saw it used — is it even wired up?
> 
> And, does that mean this pin is available for input? :)
> 
> — A
> 
> 
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