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FarmerPotato

What would you do with dual screens on a 99/4A?

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Question: what video connectors would you care about?
  • DE-15HD (VGA) + jumper for RGB-Csync or VGA-Hsync-Vsync
  • SCART with jumper to choose RGB-S or composite
  • S-Video (basically free with CXA2075 encoder)
  • RCA composite (basically free with CXA2075 encoder)
  • 99/4A Din-5 composite
  • Commodore 1084S 6-pin DIN
  • Apple DB-15 RGB-S port (Apple IIgs, Mac era)
 
I consider SCART because some of us recommend Samsung 910MP with SCART.
I'm not sure what DE-15HD to SCART cable is available unless you wire your own.
I think Apple passive adaptors are generally available.
 
I think there should be a separate PCB for connectors, with a ribbon cable.
Pros: relieves stress, allows connectors to change without major rework.
Cons: impact on impedance, crosstalk

 

 

doesn't matter long as i can build a cable.. scart is preference for rgb/15

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SCART connectors are prohibitively large on boards. I also tire of building cables. I do prefer RGBc signals usually. I use an XRGBMini and a big SCART switch box.

There are suppliers of retro DIN to SCART cables. It'd be nice to be able to grab a pre-made Sega mega drive to SCART cable or something like that.

Then there are plenty of SCART/RGB to HDMI upscalers available.

I don't feel that 15khz VGA is very US common.

-M@

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SCART connectors are prohibitively large on boards. I also tire of building cables. I do prefer RGBc signals usually. I use an XRGBMini and a big SCART switch box.

There are suppliers of retro DIN to SCART cables. It'd be nice to be able to grab a pre-made Sega mega drive to SCART cable or something like that.

Then there are plenty of SCART/RGB to HDMI upscalers available.

I don't feel that 15khz VGA is very US common.

-M@

 

I looked up the Sega mega drive cable. I like that idea.

 

What I came up with was: put all the signals on a 2x6 header. Two of them for twin VDPs. Connect by ribbon cable to a small PCB with the port. So that could be a choice of two SCART, two VGA, or  two Sega mini-DIN-8, all equally inexpensive from DirtyPCBs. For the EXT video source, I'm not sure what makes sense.

 

I'm not sure what RGBs sources you would be likely to have today? I imagine adding 99/4A graphics over your YouTube video production would be the typical use of an EXT source. 

 

And how to record the combined result?

 

 

The more I look into it, the more I want to just have twin VDP with the ability to superimpose VDP2 over VDP1.

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