Monochrom Nubus Video Cards ...

[franklyn]

There are relatively many Nubus monochrome graphics cards with a DB9 video output. Are these always TTL outputs or are they mostly ECL outputs? TTL outputs can simply be passively connected to a VGA connection.

Is there a pinout somewhere for the different DB9 video outputs?

 

[Phipli]

There are relatively many Nubus monochrome graphics cards with a DB9 video output. Are these always TTL outputs or are they mostly ECL outputs? TTL outputs can simply be passively connected to a VGA connection.

There isn't a single answer for all cards, it entirely depends on the card.

Is there a pinout somewhere for the different DB9 video outputs?

Pinouts for Mac DB9 cards are not well documented. Your best option is searching forums for specific cards, or reverse engineering it yourself. You can't rely on looking up similar pinouts for PC cards because the pinouts are not standardised.

 

[Phipli]

passively connected to a VGA connection

... through resistors, taking care to verify voltages, because they're not always 5V on all signals etc. etc. etc. On an unknown card, you really want to be checking the signals with a scope if possible (they're slow enough any old cheap scope / mini DSO thing will do).

Just in case anyone is reading this and misunderstands what the OP meant.

 

[franklyn]

Are there ECL Monochrom Nubus Cards out there?