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Apple /// and /// Plus rgb and composite video questions


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I'm trying to find specific information about the Apple /// and /// plus video outs.  Alot of sites claim the composite output of the Apple /// is monochrome. I only own an Apple /// Plus and my composite video out seems to be in color. So is this something Apple remedied from the original model /// into the plus?I get the impression the first model /// had only black and white composite video and later the /// Plus had color composite NTSC video but I would like afirmation from you guys since i dont have the hardware.I found an old mod to wire up a circuit to use the RGB out port (I assume on the original model ///) to connect a standard rgb color monitor: https://apple3.org/Documents/Schematics/ConsortiRGB.pngThat may be a fun project but first Id like to get to the bottom of the B/W vs Color composite question.This schematic shows only B/W composite going out the J-10 connector (composite out on back of ///), but does show color NTSC on J-5 pin 12 (RGB Connector) https://apple3.org/Documents/Schemat...eo%20Logic.jpgHope you guys can answer some of these questions,Edit: I tried both pins 12 and 11 on the RGB connector I am getting color from both, but they are not the same. Pin 11 is giving me the same output as the composite output on the back of the /// (which I mentioned is in color on my Plus). Pin 12 is giving me off colors which are not in the same sync as pin 11. Both seem to be giving artifacting and fringing on text.When the screen flashes and goes to the matrix of dots for the RAM test it seems to lose color. I am wondering if the color I perceive on pin 11 is not color and the signal is trying to sync proper B/W.

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On 10/3/2020 at 3:59 AM, Verault said:

I'm trying to find specific information about the Apple /// and /// plus video outs.  Alot of sites claim the composite output of the Apple /// is monochrome. I only own an Apple /// Plus and my composite video out seems to be in color. So is this something Apple remedied from the original model /// into the plus?I get the impression the first model /// had only black and white composite video and later the /// Plus had color composite NTSC video but I would like afirmation from you guys since i dont have the hardware.I found an old mod to wire up a circuit to use the RGB out port (I assume on the original model ///) to connect a standard rgb color monitor: https://apple3.org/Documents/Schematics/ConsortiRGB.pngThat may be a fun project but first Id like to get to the bottom of the B/W vs Color composite question.This schematic shows only B/W composite going out the J-10 connector (composite out on back of ///), but does show color NTSC on J-5 pin 12 (RGB Connector) https://apple3.org/Documents/Schemat...eo%20Logic.jpgHope you guys can answer some of these questions,Edit: I tried both pins 12 and 11 on the RGB connector I am getting color from both, but they are not the same. Pin 11 is giving me the same output as the composite output on the back of the /// (which I mentioned is in color on my Plus). Pin 12 is giving me off colors which are not in the same sync as pin 11. Both seem to be giving artifacting and fringing on text.When the screen flashes and goes to the matrix of dots for the RAM test it seems to lose color. I am wondering if the color I perceive on pin 11 is not color and the signal is trying to sync proper B/W.

Did you see any of these?

https://apple3.org/Documents/Technotes/TA30822.html

https://apple3.org/Documents/Technotes/TA40749.html

https://apple3.org/Documents/Technotes/TA48103.html

 

Also might ask on AtariAge forums as well. I wonder if anyone has figured out how to make Apple II to Apple III joystick converters as well.

https://atariage.com/forums/forum/158-apple-ii-computers/

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Take a look at this cable (idk if it tells you anything): https://retrofloppy.com/products/

"Apple /// Color Composite Video Adapter"

 

Going to test out that cable and see if better color comes through.

You can still get "color" via the B/W composite port on Apple /// but I think this might be using the same fake color that Apple ][ did?

Edited by zezba9000
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